diff --git a/ChangingBackground.xcodeproj/project.pbxproj b/ChangingBackground.xcodeproj/project.pbxproj
index 2e16be1..c8b78d2 100644
--- a/ChangingBackground.xcodeproj/project.pbxproj
+++ b/ChangingBackground.xcodeproj/project.pbxproj
@@ -24,6 +24,8 @@
 		001809EC171C6764002D3E93 /* blue@2x.png in Resources */ = {isa = PBXBuildFile; fileRef = 001809E8171C6764002D3E93 /* blue@2x.png */; };
 		001809ED171C6764002D3E93 /* green.png in Resources */ = {isa = PBXBuildFile; fileRef = 001809E9171C6764002D3E93 /* green.png */; };
 		001809EE171C6764002D3E93 /* green@2x.png in Resources */ = {isa = PBXBuildFile; fileRef = 001809EA171C6764002D3E93 /* green@2x.png */; };
+		DF1528581941206000770B11 /* TransitioningDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = DF1528571941206000770B11 /* TransitioningDelegate.m */; };
+		DF15285B194120A100770B11 /* AnimatedTransitioning.m in Sources */ = {isa = PBXBuildFile; fileRef = DF15285A194120A100770B11 /* AnimatedTransitioning.m */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -50,6 +52,10 @@
 		001809E8171C6764002D3E93 /* blue@2x.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "blue@2x.png"; sourceTree = "<group>"; };
 		001809E9171C6764002D3E93 /* green.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = green.png; sourceTree = "<group>"; };
 		001809EA171C6764002D3E93 /* green@2x.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "green@2x.png"; sourceTree = "<group>"; };
+		DF1528561941206000770B11 /* TransitioningDelegate.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = TransitioningDelegate.h; sourceTree = "<group>"; };
+		DF1528571941206000770B11 /* TransitioningDelegate.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = TransitioningDelegate.m; sourceTree = "<group>"; };
+		DF152859194120A100770B11 /* AnimatedTransitioning.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AnimatedTransitioning.h; sourceTree = "<group>"; };
+		DF15285A194120A100770B11 /* AnimatedTransitioning.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = AnimatedTransitioning.m; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -98,6 +104,7 @@
 			children = (
 				001809EF171C6768002D3E93 /* BackgroundImages */,
 				001809D5171C63FC002D3E93 /* AppDelegate */,
+				DF1528551941201C00770B11 /* Transitioning */,
 				001809DC171C6453002D3E93 /* ViewControllers */,
 				001809BF171C637E002D3E93 /* Supporting Files */,
 			);
@@ -167,6 +174,17 @@
 			name = BackgroundImages;
 			sourceTree = "<group>";
 		};
+		DF1528551941201C00770B11 /* Transitioning */ = {
+			isa = PBXGroup;
+			children = (
+				DF1528561941206000770B11 /* TransitioningDelegate.h */,
+				DF1528571941206000770B11 /* TransitioningDelegate.m */,
+				DF152859194120A100770B11 /* AnimatedTransitioning.h */,
+				DF15285A194120A100770B11 /* AnimatedTransitioning.m */,
+			);
+			name = Transitioning;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -238,9 +256,11 @@
 			isa = PBXSourcesBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				DF1528581941206000770B11 /* TransitioningDelegate.m in Sources */,
 				001809C5171C637E002D3E93 /* main.m in Sources */,
 				001809C9171C637E002D3E93 /* AppDelegate.m in Sources */,
 				001809D9171C6448002D3E93 /* FirstViewController.m in Sources */,
+				DF15285B194120A100770B11 /* AnimatedTransitioning.m in Sources */,
 				001809E0171C64E4002D3E93 /* SecondViewController.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -356,6 +376,7 @@
 				001809D4171C637E002D3E93 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
 	};
diff --git a/ChangingBackground/AnimatedTransitioning.h b/ChangingBackground/AnimatedTransitioning.h
new file mode 100644
index 0000000..6408f80
--- /dev/null
+++ b/ChangingBackground/AnimatedTransitioning.h
@@ -0,0 +1,15 @@
+//
+//  AnimatedTransitioning.h
+//  ChangingBackground
+//
+//  Created by Christopher Gu on 6/5/14.
+//  Copyright (c) 2014 Ora Interactive. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface AnimatedTransitioning : NSObject <UIViewControllerAnimatedTransitioning>
+
+@property (nonatomic) BOOL reverse;
+
+@end
diff --git a/ChangingBackground/AnimatedTransitioning.m b/ChangingBackground/AnimatedTransitioning.m
new file mode 100644
index 0000000..40138be
--- /dev/null
+++ b/ChangingBackground/AnimatedTransitioning.m
@@ -0,0 +1,64 @@
+//
+//  AnimatedTransitioning.m
+//  ChangingBackground
+//
+//  Created by Christopher Gu on 6/5/14.
+//  Copyright (c) 2014 Ora Interactive. All rights reserved.
+//
+
+#import "AnimatedTransitioning.h"
+#import "AppDelegate.h"
+
+static NSTimeInterval const AnimatedTransitionDuration = 0.5f;
+
+@implementation AnimatedTransitioning
+
+
+- (void)animateTransition:(id<UIViewControllerContextTransitioning>)transitionContext
+{
+    AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
+    
+    UIViewController *fromViewController = [transitionContext viewControllerForKey:UITransitionContextFromViewControllerKey];
+    UIViewController *toViewController = [transitionContext viewControllerForKey:UITransitionContextToViewControllerKey];
+    UIView *container = [transitionContext containerView];
+    
+    [container addSubview:toViewController.view];
+    
+    if (self.reverse) {
+        [UIView animateWithDuration:AnimatedTransitionDuration animations:^{
+            toViewController.view.frame = CGRectMake(-320, 0, toViewController.view.frame.size.width, toViewController.view.frame.size.height);
+            toViewController.view.frame = CGRectMake(0, 0, toViewController.view.frame.size.width, toViewController.view.frame.size.height);
+            fromViewController.view.frame = CGRectMake(320, 0, fromViewController.view.frame.size.width, fromViewController.view.frame.size.height);
+        } completion:^(BOOL finished) {
+            [transitionContext completeTransition:finished];
+            
+            [UIView transitionWithView:appDelegate.window duration:0.5f options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
+                appDelegate.window.backgroundColor = [UIColor colorWithPatternImage:appDelegate.blueBackground];
+            } completion:^(BOOL finished) {
+                
+            }];
+        }];
+    }
+    else {
+        [UIView animateWithDuration:AnimatedTransitionDuration animations:^{
+            toViewController.view.frame = CGRectMake(320, 0, toViewController.view.frame.size.width, toViewController.view.frame.size.height);
+            toViewController.view.frame = CGRectMake(0, 0, toViewController.view.frame.size.width, toViewController.view.frame.size.height);
+            fromViewController.view.frame = CGRectMake(-320, 0, fromViewController.view.frame.size.width, fromViewController.view.frame.size.height);
+        } completion:^(BOOL finished) {
+            [transitionContext completeTransition:finished];
+            
+            [UIView transitionWithView:appDelegate.window duration:0.5f options:UIViewAnimationOptionTransitionCrossDissolve animations:^{
+                appDelegate.window.backgroundColor = [UIColor colorWithPatternImage:appDelegate.greenBackground];
+            } completion:^(BOOL finished) {
+                
+            }];
+        }];
+    }
+}
+
+- (NSTimeInterval)transitionDuration:(id<UIViewControllerContextTransitioning>)transitionContext
+{
+    return AnimatedTransitionDuration;
+}
+
+@end
\ No newline at end of file
diff --git a/ChangingBackground/AppDelegate.h b/ChangingBackground/AppDelegate.h
index f96be1d..d6f9223 100644
--- a/ChangingBackground/AppDelegate.h
+++ b/ChangingBackground/AppDelegate.h
@@ -9,5 +9,8 @@
 #import <UIKit/UIKit.h>
 
 @interface AppDelegate : UIResponder <UIApplicationDelegate>
+@property (strong, nonatomic) UIWindow *window;
+@property (strong, nonatomic) UIImage *blueBackground;
+@property (strong, nonatomic) UIImage *greenBackground;
 
 @end
diff --git a/ChangingBackground/AppDelegate.m b/ChangingBackground/AppDelegate.m
index 9538cc1..05e2e7f 100644
--- a/ChangingBackground/AppDelegate.m
+++ b/ChangingBackground/AppDelegate.m
@@ -7,27 +7,47 @@
 //
 
 #import "AppDelegate.h"
+#import "TransitioningDelegate.h"
 #import "FirstViewController.h"
 
 @interface AppDelegate () {
-    UIWindow *window;
 }
+@property (nonatomic, strong) TransitioningDelegate *transitioningDelegate;
+
 @end
 
 
 @implementation AppDelegate
 
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
-    window = [UIWindow.alloc initWithFrame:UIScreen.mainScreen.bounds];
-    [window makeKeyAndVisible];
+    self.window = [UIWindow.alloc initWithFrame:UIScreen.mainScreen.bounds];
+    [self.window makeKeyAndVisible];
     
     FirstViewController *firstViewController = FirstViewController.new;
-    UINavigationController *navigationController = [UINavigationController.alloc initWithRootViewController:firstViewController];
-    [navigationController setNavigationBarHidden:YES];
-
-    window.rootViewController = navigationController;
+    
+    self.transitioningDelegate = [TransitioningDelegate new];
+    firstViewController.transitioningDelegate = self.transitioningDelegate;
+    self.window.rootViewController = firstViewController;
+    
+    self.blueBackground = [self imageWithImage:[UIImage imageNamed:@"blue"] scaledToSize:CGSizeMake(320, 568)];
+    self.greenBackground = [self imageWithImage:[UIImage imageNamed:@"green"] scaledToSize:CGSizeMake(320, 568)];
+    
+    self.window.backgroundColor = [UIColor colorWithPatternImage:self.blueBackground];
     
     return YES;
 }
 
+// the image sizes are too short for 4-inch
+- (UIImage*)imageWithImage:(UIImage*)image
+              scaledToSize:(CGSize)newSize
+{
+    UIGraphicsBeginImageContext( newSize );
+    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
+    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
+    UIGraphicsEndImageContext();
+    
+    return newImage;
+}
+
 @end
+
diff --git a/ChangingBackground/FirstViewController.m b/ChangingBackground/FirstViewController.m
index 8aedb68..738a96d 100644
--- a/ChangingBackground/FirstViewController.m
+++ b/ChangingBackground/FirstViewController.m
@@ -10,14 +10,23 @@
 #import "SecondViewController.h"
 
 @interface FirstViewController ()
-
+{
+    IBOutlet UIButton *goForwardButton;
+}
 @end
 
 @implementation FirstViewController
 
+-(void)viewDidLoad
+{
+    self.view.backgroundColor = [UIColor clearColor];
+    goForwardButton.layer.cornerRadius = 5.0;
+}
+
 - (IBAction)goForwardButtonPressed {
     SecondViewController *secondViewController = SecondViewController.new;
-    [self.navigationController pushViewController:secondViewController animated:YES];
+    secondViewController.transitioningDelegate = self.transitioningDelegate;
+    [self presentViewController:secondViewController animated:YES completion:nil];
 }
 
 @end
diff --git a/ChangingBackground/FirstViewController.xib b/ChangingBackground/FirstViewController.xib
index 0dd58c2..72ad0b8 100644
--- a/ChangingBackground/FirstViewController.xib
+++ b/ChangingBackground/FirstViewController.xib
@@ -1,217 +1,43 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<archive type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="8.00">
-	<data>
-		<int key="IBDocument.SystemTarget">1552</int>
-		<string key="IBDocument.SystemVersion">12C3006</string>
-		<string key="IBDocument.InterfaceBuilderVersion">3084</string>
-		<string key="IBDocument.AppKitVersion">1187.34</string>
-		<string key="IBDocument.HIToolboxVersion">625.00</string>
-		<object class="NSMutableDictionary" key="IBDocument.PluginVersions">
-			<string key="NS.key.0">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-			<string key="NS.object.0">2083</string>
-		</object>
-		<array key="IBDocument.IntegratedClassDependencies">
-			<string>IBProxyObject</string>
-			<string>IBUIButton</string>
-			<string>IBUILabel</string>
-			<string>IBUIView</string>
-		</array>
-		<array key="IBDocument.PluginDependencies">
-			<string>com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-		</array>
-		<object class="NSMutableDictionary" key="IBDocument.Metadata">
-			<string key="NS.key.0">PluginDependencyRecalculationVersion</string>
-			<integer value="1" key="NS.object.0"/>
-		</object>
-		<array class="NSMutableArray" key="IBDocument.RootObjects" id="1000">
-			<object class="IBProxyObject" id="372490531">
-				<string key="IBProxiedObjectIdentifier">IBFilesOwner</string>
-				<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
-			</object>
-			<object class="IBProxyObject" id="975951072">
-				<string key="IBProxiedObjectIdentifier">IBFirstResponder</string>
-				<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
-			</object>
-			<object class="IBUIView" id="191373211">
-				<nil key="NSNextResponder"/>
-				<int key="NSvFlags">274</int>
-				<array class="NSMutableArray" key="NSSubviews">
-					<object class="IBUILabel" id="706097280">
-						<reference key="NSNextResponder" ref="191373211"/>
-						<int key="NSvFlags">292</int>
-						<string key="NSFrame">{{77, 115}, {166, 21}}</string>
-						<reference key="NSSuperview" ref="191373211"/>
-						<reference key="NSNextKeyView" ref="545115536"/>
-						<string key="NSReuseIdentifierKey">_NS:9</string>
-						<bool key="IBUIOpaque">NO</bool>
-						<bool key="IBUIClipsSubviews">YES</bool>
-						<int key="IBUIContentMode">7</int>
-						<bool key="IBUIUserInteractionEnabled">NO</bool>
-						<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
-						<string key="IBUIText">Home View Controller</string>
-						<object class="NSColor" key="IBUITextColor">
-							<int key="NSColorSpace">1</int>
-							<bytes key="NSRGB">MCAwIDAAA</bytes>
-							<string key="IBUIColorCocoaTouchKeyPath">darkTextColor</string>
-						</object>
-						<nil key="IBUIHighlightedColor"/>
-						<int key="IBUIBaselineAdjustment">0</int>
-						<object class="IBUIFontDescription" key="IBUIFontDescription">
-							<int key="type">1</int>
-							<double key="pointSize">17</double>
-						</object>
-						<object class="NSFont" key="IBUIFont">
-							<string key="NSName">Helvetica</string>
-							<double key="NSSize">17</double>
-							<int key="NSfFlags">16</int>
-						</object>
-						<bool key="IBUIAdjustsFontSizeToFit">NO</bool>
-					</object>
-					<object class="IBUIButton" id="545115536">
-						<reference key="NSNextResponder" ref="191373211"/>
-						<int key="NSvFlags">292</int>
-						<string key="NSFrame">{{102, 180}, {109, 44}}</string>
-						<reference key="NSSuperview" ref="191373211"/>
-						<string key="NSReuseIdentifierKey">_NS:9</string>
-						<bool key="IBUIOpaque">NO</bool>
-						<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
-						<int key="IBUIContentHorizontalAlignment">0</int>
-						<int key="IBUIContentVerticalAlignment">0</int>
-						<int key="IBUIButtonType">1</int>
-						<string key="IBUINormalTitle">Go Forward</string>
-						<object class="NSColor" key="IBUIHighlightedTitleColor">
-							<int key="NSColorSpace">3</int>
-							<bytes key="NSWhite">MQA</bytes>
-						</object>
-						<object class="NSColor" key="IBUINormalTitleColor">
-							<int key="NSColorSpace">1</int>
-							<bytes key="NSRGB">MC4xOTYwNzg0MzQ2IDAuMzA5ODAzOTMyOSAwLjUyMTU2ODY1NgA</bytes>
-						</object>
-						<object class="NSColor" key="IBUINormalTitleShadowColor">
-							<int key="NSColorSpace">3</int>
-							<bytes key="NSWhite">MC41AA</bytes>
-						</object>
-						<object class="IBUIFontDescription" key="IBUIFontDescription">
-							<int key="type">2</int>
-							<double key="pointSize">15</double>
-						</object>
-						<object class="NSFont" key="IBUIFont">
-							<string key="NSName">Helvetica-Bold</string>
-							<double key="NSSize">15</double>
-							<int key="NSfFlags">16</int>
-						</object>
-					</object>
-				</array>
-				<string key="NSFrame">{{0, 20}, {320, 548}}</string>
-				<reference key="NSNextKeyView" ref="706097280"/>
-				<object class="NSColor" key="IBUIBackgroundColor">
-					<int key="NSColorSpace">3</int>
-					<bytes key="NSWhite">MQA</bytes>
-					<object class="NSColorSpace" key="NSCustomColorSpace">
-						<int key="NSID">2</int>
-					</object>
-				</object>
-				<object class="IBUISimulatedStatusBarMetrics" key="IBUISimulatedStatusBarMetrics"/>
-				<object class="IBUIScreenMetrics" key="IBUISimulatedDestinationMetrics">
-					<string key="IBUISimulatedSizeMetricsClass">IBUIScreenMetrics</string>
-					<object class="NSMutableDictionary" key="IBUINormalizedOrientationToSizeMap">
-						<bool key="EncodedWithXMLCoder">YES</bool>
-						<array key="dict.sortedKeys">
-							<integer value="1"/>
-							<integer value="3"/>
-						</array>
-						<array key="dict.values">
-							<string>{320, 568}</string>
-							<string>{568, 320}</string>
-						</array>
-					</object>
-					<string key="IBUITargetRuntime">IBCocoaTouchFramework</string>
-					<string key="IBUIDisplayName">Retina 4 Full Screen</string>
-					<int key="IBUIType">2</int>
-				</object>
-				<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
-			</object>
-		</array>
-		<object class="IBObjectContainer" key="IBDocument.Objects">
-			<array class="NSMutableArray" key="connectionRecords">
-				<object class="IBConnectionRecord">
-					<object class="IBCocoaTouchOutletConnection" key="connection">
-						<string key="label">view</string>
-						<reference key="source" ref="372490531"/>
-						<reference key="destination" ref="191373211"/>
-					</object>
-					<int key="connectionID">3</int>
-				</object>
-				<object class="IBConnectionRecord">
-					<object class="IBCocoaTouchEventConnection" key="connection">
-						<string key="label">goForwardButtonPressed</string>
-						<reference key="source" ref="545115536"/>
-						<reference key="destination" ref="372490531"/>
-						<int key="IBEventType">7</int>
-					</object>
-					<int key="connectionID">8</int>
-				</object>
-			</array>
-			<object class="IBMutableOrderedSet" key="objectRecords">
-				<array key="orderedObjects">
-					<object class="IBObjectRecord">
-						<int key="objectID">0</int>
-						<array key="object" id="0"/>
-						<reference key="children" ref="1000"/>
-						<nil key="parent"/>
-					</object>
-					<object class="IBObjectRecord">
-						<int key="objectID">1</int>
-						<reference key="object" ref="191373211"/>
-						<array class="NSMutableArray" key="children">
-							<reference ref="706097280"/>
-							<reference ref="545115536"/>
-						</array>
-						<reference key="parent" ref="0"/>
-					</object>
-					<object class="IBObjectRecord">
-						<int key="objectID">-1</int>
-						<reference key="object" ref="372490531"/>
-						<reference key="parent" ref="0"/>
-						<string key="objectName">File's Owner</string>
-					</object>
-					<object class="IBObjectRecord">
-						<int key="objectID">-2</int>
-						<reference key="object" ref="975951072"/>
-						<reference key="parent" ref="0"/>
-					</object>
-					<object class="IBObjectRecord">
-						<int key="objectID">4</int>
-						<reference key="object" ref="706097280"/>
-						<reference key="parent" ref="191373211"/>
-					</object>
-					<object class="IBObjectRecord">
-						<int key="objectID">7</int>
-						<reference key="object" ref="545115536"/>
-						<reference key="parent" ref="191373211"/>
-					</object>
-				</array>
-			</object>
-			<dictionary class="NSMutableDictionary" key="flattenedProperties">
-				<string key="-1.CustomClassName">FirstViewController</string>
-				<string key="-1.IBPluginDependency">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-				<string key="-2.CustomClassName">UIResponder</string>
-				<string key="-2.IBPluginDependency">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-				<string key="1.IBPluginDependency">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-				<string key="4.IBPluginDependency">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-				<string key="7.IBPluginDependency">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-			</dictionary>
-			<dictionary class="NSMutableDictionary" key="unlocalizedProperties"/>
-			<nil key="activeLocalization"/>
-			<dictionary class="NSMutableDictionary" key="localizations"/>
-			<nil key="sourceID"/>
-			<int key="maxID">8</int>
-		</object>
-		<object class="IBClassDescriber" key="IBDocument.Classes"/>
-		<int key="IBDocument.localizationMode">0</int>
-		<string key="IBDocument.TargetRuntimeIdentifier">IBCocoaTouchFramework</string>
-		<bool key="IBDocument.PluginDeclaredDependenciesTrackSystemTargetVersion">YES</bool>
-		<int key="IBDocument.defaultPropertyAccessControl">3</int>
-		<string key="IBCocoaTouchPluginVersion">2083</string>
-	</data>
-</archive>
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="5056" systemVersion="13D65" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none">
+    <dependencies>
+        <deployment defaultVersion="1552" identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="3733"/>
+    </dependencies>
+    <objects>
+        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner" customClass="FirstViewController">
+            <connections>
+                <outlet property="goForwardButton" destination="7" id="1NV-S8-nYo"/>
+                <outlet property="view" destination="1" id="3"/>
+            </connections>
+        </placeholder>
+        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
+        <view contentMode="scaleToFill" id="1">
+            <rect key="frame" x="0.0" y="0.0" width="320" height="568"/>
+            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+            <subviews>
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" text="Home View Controller" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="4">
+                    <rect key="frame" x="74" y="115" width="173" height="21"/>
+                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                    <color key="textColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
+                    <nil key="highlightedColor"/>
+                </label>
+                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" id="7">
+                    <rect key="frame" x="110" y="180" width="100" height="35"/>
+                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                    <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
+                    <state key="normal" title="Go Forward">
+                        <color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
+                    </state>
+                    <connections>
+                        <action selector="goForwardButtonPressed" destination="-1" eventType="touchUpInside" id="8"/>
+                    </connections>
+                </button>
+            </subviews>
+            <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+            <simulatedStatusBarMetrics key="simulatedStatusBarMetrics"/>
+            <simulatedScreenMetrics key="simulatedDestinationMetrics" type="retina4"/>
+        </view>
+    </objects>
+</document>
diff --git a/ChangingBackground/SecondViewController.m b/ChangingBackground/SecondViewController.m
index 028f811..1017705 100644
--- a/ChangingBackground/SecondViewController.m
+++ b/ChangingBackground/SecondViewController.m
@@ -8,11 +8,19 @@
 
 #import "SecondViewController.h"
 
+@implementation SecondViewController 
+{
+    IBOutlet UIButton *goBackButton;
+}
 
-@implementation SecondViewController
+-(void)viewDidLoad
+{
+    self.view.backgroundColor = [UIColor clearColor];
+    goBackButton.layer.cornerRadius = 5.0;
+}
 
 - (IBAction)goBackButtonPressed {
-    [self.navigationController popViewControllerAnimated:YES];
+    [self dismissViewControllerAnimated:YES completion:nil];
 }
 
 @end
diff --git a/ChangingBackground/SecondViewController.xib b/ChangingBackground/SecondViewController.xib
index d603949..259141f 100644
--- a/ChangingBackground/SecondViewController.xib
+++ b/ChangingBackground/SecondViewController.xib
@@ -1,243 +1,43 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<archive type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="8.00">
-	<data>
-		<int key="IBDocument.SystemTarget">1552</int>
-		<string key="IBDocument.SystemVersion">12C3006</string>
-		<string key="IBDocument.InterfaceBuilderVersion">3084</string>
-		<string key="IBDocument.AppKitVersion">1187.34</string>
-		<string key="IBDocument.HIToolboxVersion">625.00</string>
-		<object class="NSMutableDictionary" key="IBDocument.PluginVersions">
-			<string key="NS.key.0">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-			<string key="NS.object.0">2083</string>
-		</object>
-		<array key="IBDocument.IntegratedClassDependencies">
-			<string>IBProxyObject</string>
-			<string>IBUIButton</string>
-			<string>IBUILabel</string>
-			<string>IBUIView</string>
-		</array>
-		<array key="IBDocument.PluginDependencies">
-			<string>com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-		</array>
-		<object class="NSMutableDictionary" key="IBDocument.Metadata">
-			<string key="NS.key.0">PluginDependencyRecalculationVersion</string>
-			<integer value="1" key="NS.object.0"/>
-		</object>
-		<array class="NSMutableArray" key="IBDocument.RootObjects" id="1000">
-			<object class="IBProxyObject" id="372490531">
-				<string key="IBProxiedObjectIdentifier">IBFilesOwner</string>
-				<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
-			</object>
-			<object class="IBProxyObject" id="975951072">
-				<string key="IBProxiedObjectIdentifier">IBFirstResponder</string>
-				<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
-			</object>
-			<object class="IBUIView" id="191373211">
-				<reference key="NSNextResponder"/>
-				<int key="NSvFlags">274</int>
-				<array class="NSMutableArray" key="NSSubviews">
-					<object class="IBUILabel" id="608025062">
-						<reference key="NSNextResponder" ref="191373211"/>
-						<int key="NSvFlags">292</int>
-						<string key="NSFrame">{{71, 118}, {209, 21}}</string>
-						<reference key="NSSuperview" ref="191373211"/>
-						<reference key="NSWindow"/>
-						<reference key="NSNextKeyView" ref="296395786"/>
-						<string key="NSReuseIdentifierKey">_NS:9</string>
-						<bool key="IBUIOpaque">NO</bool>
-						<bool key="IBUIClipsSubviews">YES</bool>
-						<int key="IBUIContentMode">7</int>
-						<bool key="IBUIUserInteractionEnabled">NO</bool>
-						<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
-						<string key="IBUIText">Second View Controller</string>
-						<object class="NSColor" key="IBUITextColor">
-							<int key="NSColorSpace">1</int>
-							<bytes key="NSRGB">MCAwIDAAA</bytes>
-							<string key="IBUIColorCocoaTouchKeyPath">darkTextColor</string>
-						</object>
-						<nil key="IBUIHighlightedColor"/>
-						<int key="IBUIBaselineAdjustment">0</int>
-						<object class="IBUIFontDescription" key="IBUIFontDescription">
-							<int key="type">1</int>
-							<double key="pointSize">17</double>
-						</object>
-						<object class="NSFont" key="IBUIFont">
-							<string key="NSName">Helvetica</string>
-							<double key="NSSize">17</double>
-							<int key="NSfFlags">16</int>
-						</object>
-						<bool key="IBUIAdjustsFontSizeToFit">NO</bool>
-					</object>
-					<object class="IBUIButton" id="296395786">
-						<reference key="NSNextResponder" ref="191373211"/>
-						<int key="NSvFlags">292</int>
-						<string key="NSFrame">{{118, 178}, {85, 44}}</string>
-						<reference key="NSSuperview" ref="191373211"/>
-						<reference key="NSWindow"/>
-						<string key="NSReuseIdentifierKey">_NS:9</string>
-						<bool key="IBUIOpaque">NO</bool>
-						<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
-						<int key="IBUIContentHorizontalAlignment">0</int>
-						<int key="IBUIContentVerticalAlignment">0</int>
-						<int key="IBUIButtonType">1</int>
-						<string key="IBUINormalTitle">Go Back</string>
-						<object class="NSColor" key="IBUIHighlightedTitleColor">
-							<int key="NSColorSpace">3</int>
-							<bytes key="NSWhite">MQA</bytes>
-						</object>
-						<object class="NSColor" key="IBUINormalTitleColor">
-							<int key="NSColorSpace">1</int>
-							<bytes key="NSRGB">MC4xOTYwNzg0MzQ2IDAuMzA5ODAzOTMyOSAwLjUyMTU2ODY1NgA</bytes>
-						</object>
-						<object class="NSColor" key="IBUINormalTitleShadowColor">
-							<int key="NSColorSpace">3</int>
-							<bytes key="NSWhite">MC41AA</bytes>
-						</object>
-						<object class="IBUIFontDescription" key="IBUIFontDescription">
-							<int key="type">2</int>
-							<double key="pointSize">15</double>
-						</object>
-						<object class="NSFont" key="IBUIFont">
-							<string key="NSName">Helvetica-Bold</string>
-							<double key="NSSize">15</double>
-							<int key="NSfFlags">16</int>
-						</object>
-					</object>
-				</array>
-				<string key="NSFrame">{{0, 20}, {320, 548}}</string>
-				<reference key="NSSuperview"/>
-				<reference key="NSWindow"/>
-				<reference key="NSNextKeyView" ref="608025062"/>
-				<object class="NSColor" key="IBUIBackgroundColor">
-					<int key="NSColorSpace">3</int>
-					<bytes key="NSWhite">MQA</bytes>
-					<object class="NSColorSpace" key="NSCustomColorSpace">
-						<int key="NSID">2</int>
-					</object>
-				</object>
-				<object class="IBUISimulatedStatusBarMetrics" key="IBUISimulatedStatusBarMetrics"/>
-				<object class="IBUIScreenMetrics" key="IBUISimulatedDestinationMetrics">
-					<string key="IBUISimulatedSizeMetricsClass">IBUIScreenMetrics</string>
-					<object class="NSMutableDictionary" key="IBUINormalizedOrientationToSizeMap">
-						<bool key="EncodedWithXMLCoder">YES</bool>
-						<array key="dict.sortedKeys">
-							<integer value="1"/>
-							<integer value="3"/>
-						</array>
-						<array key="dict.values">
-							<string>{320, 568}</string>
-							<string>{568, 320}</string>
-						</array>
-					</object>
-					<string key="IBUITargetRuntime">IBCocoaTouchFramework</string>
-					<string key="IBUIDisplayName">Retina 4 Full Screen</string>
-					<int key="IBUIType">2</int>
-				</object>
-				<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
-			</object>
-		</array>
-		<object class="IBObjectContainer" key="IBDocument.Objects">
-			<array class="NSMutableArray" key="connectionRecords">
-				<object class="IBConnectionRecord">
-					<object class="IBCocoaTouchOutletConnection" key="connection">
-						<string key="label">view</string>
-						<reference key="source" ref="372490531"/>
-						<reference key="destination" ref="191373211"/>
-					</object>
-					<int key="connectionID">3</int>
-				</object>
-				<object class="IBConnectionRecord">
-					<object class="IBCocoaTouchEventConnection" key="connection">
-						<string key="label">goBackButtonPressed</string>
-						<reference key="source" ref="296395786"/>
-						<reference key="destination" ref="372490531"/>
-						<int key="IBEventType">7</int>
-					</object>
-					<int key="connectionID">10</int>
-				</object>
-			</array>
-			<object class="IBMutableOrderedSet" key="objectRecords">
-				<array key="orderedObjects">
-					<object class="IBObjectRecord">
-						<int key="objectID">0</int>
-						<array key="object" id="0"/>
-						<reference key="children" ref="1000"/>
-						<nil key="parent"/>
-					</object>
-					<object class="IBObjectRecord">
-						<int key="objectID">1</int>
-						<reference key="object" ref="191373211"/>
-						<array class="NSMutableArray" key="children">
-							<reference ref="608025062"/>
-							<reference ref="296395786"/>
-						</array>
-						<reference key="parent" ref="0"/>
-					</object>
-					<object class="IBObjectRecord">
-						<int key="objectID">-1</int>
-						<reference key="object" ref="372490531"/>
-						<reference key="parent" ref="0"/>
-						<string key="objectName">File's Owner</string>
-					</object>
-					<object class="IBObjectRecord">
-						<int key="objectID">-2</int>
-						<reference key="object" ref="975951072"/>
-						<reference key="parent" ref="0"/>
-					</object>
-					<object class="IBObjectRecord">
-						<int key="objectID">4</int>
-						<reference key="object" ref="296395786"/>
-						<reference key="parent" ref="191373211"/>
-					</object>
-					<object class="IBObjectRecord">
-						<int key="objectID">7</int>
-						<reference key="object" ref="608025062"/>
-						<reference key="parent" ref="191373211"/>
-					</object>
-				</array>
-			</object>
-			<dictionary class="NSMutableDictionary" key="flattenedProperties">
-				<string key="-1.CustomClassName">SecondViewController</string>
-				<string key="-1.IBPluginDependency">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-				<string key="-2.CustomClassName">UIResponder</string>
-				<string key="-2.IBPluginDependency">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-				<string key="1.IBPluginDependency">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-				<string key="4.IBPluginDependency">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-				<string key="7.IBPluginDependency">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
-			</dictionary>
-			<dictionary class="NSMutableDictionary" key="unlocalizedProperties"/>
-			<nil key="activeLocalization"/>
-			<dictionary class="NSMutableDictionary" key="localizations"/>
-			<nil key="sourceID"/>
-			<int key="maxID">10</int>
-		</object>
-		<object class="IBClassDescriber" key="IBDocument.Classes">
-			<array class="NSMutableArray" key="referencedPartialClassDescriptions">
-				<object class="IBPartialClassDescription">
-					<string key="className">SecondViewController</string>
-					<string key="superclassName">UIViewController</string>
-					<object class="NSMutableDictionary" key="actions">
-						<string key="NS.key.0">goBackButtonPressed</string>
-						<string key="NS.object.0">id</string>
-					</object>
-					<object class="NSMutableDictionary" key="actionInfosByName">
-						<string key="NS.key.0">goBackButtonPressed</string>
-						<object class="IBActionInfo" key="NS.object.0">
-							<string key="name">goBackButtonPressed</string>
-							<string key="candidateClassName">id</string>
-						</object>
-					</object>
-					<object class="IBClassDescriptionSource" key="sourceIdentifier">
-						<string key="majorKey">IBProjectSource</string>
-						<string key="minorKey">./Classes/SecondViewController.h</string>
-					</object>
-				</object>
-			</array>
-		</object>
-		<int key="IBDocument.localizationMode">0</int>
-		<string key="IBDocument.TargetRuntimeIdentifier">IBCocoaTouchFramework</string>
-		<bool key="IBDocument.PluginDeclaredDependenciesTrackSystemTargetVersion">YES</bool>
-		<int key="IBDocument.defaultPropertyAccessControl">3</int>
-		<string key="IBCocoaTouchPluginVersion">2083</string>
-	</data>
-</archive>
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="3.0" toolsVersion="5056" systemVersion="13D65" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none">
+    <dependencies>
+        <deployment defaultVersion="1552" identifier="iOS"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="3733"/>
+    </dependencies>
+    <objects>
+        <placeholder placeholderIdentifier="IBFilesOwner" id="-1" userLabel="File's Owner" customClass="SecondViewController">
+            <connections>
+                <outlet property="goBackButton" destination="4" id="nbk-I0-Qy6"/>
+                <outlet property="view" destination="1" id="3"/>
+            </connections>
+        </placeholder>
+        <placeholder placeholderIdentifier="IBFirstResponder" id="-2" customClass="UIResponder"/>
+        <view contentMode="scaleToFill" id="1">
+            <rect key="frame" x="0.0" y="0.0" width="320" height="568"/>
+            <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+            <subviews>
+                <label opaque="NO" clipsSubviews="YES" userInteractionEnabled="NO" contentMode="left" text="Second View Controller" textAlignment="center" lineBreakMode="tailTruncation" baselineAdjustment="alignBaselines" adjustsFontSizeToFit="NO" id="7">
+                    <rect key="frame" x="56" y="115" width="209" height="21"/>
+                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                    <fontDescription key="fontDescription" type="system" pointSize="17"/>
+                    <color key="textColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
+                    <nil key="highlightedColor"/>
+                </label>
+                <button opaque="NO" contentMode="scaleToFill" contentHorizontalAlignment="center" contentVerticalAlignment="center" buttonType="roundedRect" lineBreakMode="middleTruncation" id="4">
+                    <rect key="frame" x="120" y="180" width="80" height="35"/>
+                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                    <color key="backgroundColor" white="1" alpha="1" colorSpace="calibratedWhite"/>
+                    <state key="normal" title="Go Back">
+                        <color key="titleShadowColor" white="0.5" alpha="1" colorSpace="calibratedWhite"/>
+                    </state>
+                    <connections>
+                        <action selector="goBackButtonPressed" destination="-1" eventType="touchUpInside" id="10"/>
+                    </connections>
+                </button>
+            </subviews>
+            <color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
+            <simulatedStatusBarMetrics key="simulatedStatusBarMetrics"/>
+            <simulatedScreenMetrics key="simulatedDestinationMetrics" type="retina4"/>
+        </view>
+    </objects>
+</document>
diff --git a/ChangingBackground/TransitioningDelegate.h b/ChangingBackground/TransitioningDelegate.h
new file mode 100644
index 0000000..7c46f84
--- /dev/null
+++ b/ChangingBackground/TransitioningDelegate.h
@@ -0,0 +1,13 @@
+//
+//  TransitioningDelegate.h
+//  ChangingBackground
+//
+//  Created by Christopher Gu on 6/5/14.
+//  Copyright (c) 2014 Ora Interactive. All rights reserved.
+//
+
+#import <Foundation/Foundation.h>
+
+@interface TransitioningDelegate : NSObject <UIViewControllerTransitioningDelegate>
+
+@end
diff --git a/ChangingBackground/TransitioningDelegate.m b/ChangingBackground/TransitioningDelegate.m
new file mode 100644
index 0000000..06da258
--- /dev/null
+++ b/ChangingBackground/TransitioningDelegate.m
@@ -0,0 +1,28 @@
+//
+//  TransitioningDelegate.m
+//  ChangingBackground
+//
+//  Created by Christopher Gu on 6/5/14.
+//  Copyright (c) 2014 Ora Interactive. All rights reserved.
+//
+
+#import "TransitioningDelegate.h"
+#import "AnimatedTransitioning.h"
+
+
+@implementation TransitioningDelegate
+
+- (id <UIViewControllerAnimatedTransitioning>)animationControllerForPresentedController:(UIViewController *)presented presentingController:(UIViewController *)presenting sourceController:(UIViewController *)source
+{
+    AnimatedTransitioning *transitioning = [AnimatedTransitioning new];
+    return transitioning;
+}
+
+- (id <UIViewControllerAnimatedTransitioning>)animationControllerForDismissedController:(UIViewController *)dismissed
+{
+    AnimatedTransitioning *transitioning = [AnimatedTransitioning new];
+    transitioning.reverse = YES;
+    return transitioning;
+}
+
+@end