diff --git a/ChangingBackground.xcodeproj/project.pbxproj b/ChangingBackground.xcodeproj/project.pbxproj
index 2e16be1..56c5387 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 */; };
+		67B6165F1912C21100E08AC1 /* UINavigationController+CustomTransition.m in Sources */ = {isa = PBXBuildFile; fileRef = 67B6165E1912C21100E08AC1 /* UINavigationController+CustomTransition.m */; };
+		67B616631912C3D100E08AC1 /* QuartzCore.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 67B616621912C3D100E08AC1 /* QuartzCore.framework */; };
 /* End PBXBuildFile section */
 
 /* Begin PBXFileReference section */
@@ -50,6 +52,9 @@
 		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>"; };
+		67B6165D1912C21100E08AC1 /* UINavigationController+CustomTransition.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = "UINavigationController+CustomTransition.h"; sourceTree = "<group>"; };
+		67B6165E1912C21100E08AC1 /* UINavigationController+CustomTransition.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = "UINavigationController+CustomTransition.m"; sourceTree = "<group>"; };
+		67B616621912C3D100E08AC1 /* QuartzCore.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = QuartzCore.framework; path = System/Library/Frameworks/QuartzCore.framework; sourceTree = SDKROOT; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -57,6 +62,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				67B616631912C3D100E08AC1 /* QuartzCore.framework in Frameworks */,
 				001809B9171C637E002D3E93 /* UIKit.framework in Frameworks */,
 				001809BB171C637E002D3E93 /* Foundation.framework in Frameworks */,
 				001809BD171C637E002D3E93 /* CoreGraphics.framework in Frameworks */,
@@ -86,6 +92,7 @@
 		001809B7171C637E002D3E93 /* Frameworks */ = {
 			isa = PBXGroup;
 			children = (
+				67B616621912C3D100E08AC1 /* QuartzCore.framework */,
 				001809B8171C637E002D3E93 /* UIKit.framework */,
 				001809BA171C637E002D3E93 /* Foundation.framework */,
 				001809BC171C637E002D3E93 /* CoreGraphics.framework */,
@@ -96,6 +103,7 @@
 		001809BE171C637E002D3E93 /* ChangingBackground */ = {
 			isa = PBXGroup;
 			children = (
+				67B6165C1912C1A100E08AC1 /* Categories */,
 				001809EF171C6768002D3E93 /* BackgroundImages */,
 				001809D5171C63FC002D3E93 /* AppDelegate */,
 				001809DC171C6453002D3E93 /* ViewControllers */,
@@ -167,6 +175,15 @@
 			name = BackgroundImages;
 			sourceTree = "<group>";
 		};
+		67B6165C1912C1A100E08AC1 /* Categories */ = {
+			isa = PBXGroup;
+			children = (
+				67B6165D1912C21100E08AC1 /* UINavigationController+CustomTransition.h */,
+				67B6165E1912C21100E08AC1 /* UINavigationController+CustomTransition.m */,
+			);
+			name = Categories;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */
@@ -241,6 +258,7 @@
 				001809C5171C637E002D3E93 /* main.m in Sources */,
 				001809C9171C637E002D3E93 /* AppDelegate.m in Sources */,
 				001809D9171C6448002D3E93 /* FirstViewController.m in Sources */,
+				67B6165F1912C21100E08AC1 /* UINavigationController+CustomTransition.m in Sources */,
 				001809E0171C64E4002D3E93 /* SecondViewController.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -356,6 +374,7 @@
 				001809D4171C637E002D3E93 /* Release */,
 			);
 			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
 	};
diff --git a/ChangingBackground/AppDelegate.h b/ChangingBackground/AppDelegate.h
index f96be1d..408b00f 100644
--- a/ChangingBackground/AppDelegate.h
+++ b/ChangingBackground/AppDelegate.h
@@ -10,4 +10,7 @@
 
 @interface AppDelegate : UIResponder <UIApplicationDelegate>
 
+- (void)fadeFromBlueToGreenImage;
+- (void)fadeFromGreenToBlueImage;
+
 @end
diff --git a/ChangingBackground/AppDelegate.m b/ChangingBackground/AppDelegate.m
index 9538cc1..9259c73 100644
--- a/ChangingBackground/AppDelegate.m
+++ b/ChangingBackground/AppDelegate.m
@@ -12,6 +12,11 @@
 @interface AppDelegate () {
     UIWindow *window;
 }
+
+//These UIImageView properties will be added as subviews of window
+@property (nonatomic, strong) UIImageView* blueBGImageView;
+@property (nonatomic, strong) UIImageView* greenBGImageView;
+
 @end
 
 
@@ -21,7 +26,21 @@ - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(
     window = [UIWindow.alloc initWithFrame:UIScreen.mainScreen.bounds];
     [window makeKeyAndVisible];
     
+    //Adding an imageView with the Green image as a subview of window
+    self.greenBGImageView = [[UIImageView alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
+    [self.greenBGImageView setImage:[UIImage imageNamed:@"green.png"]];
+    [window addSubview:self.greenBGImageView];
+
+    //Adding an imageView with the Blue image as a subview of window (on top of greenImageView)
+    self.blueBGImageView = [[UIImageView alloc]initWithFrame:[[UIScreen mainScreen] bounds]];
+    [self.blueBGImageView setImage:[UIImage imageNamed:@"blue.png"]];
+    [window addSubview:self.blueBGImageView];
+    
     FirstViewController *firstViewController = FirstViewController.new;
+    
+    //Making the background color of FirstViewController clearColor so that the imageViews added as subviews of window can be seen.
+    [firstViewController.view setBackgroundColor:[UIColor clearColor]];
+    
     UINavigationController *navigationController = [UINavigationController.alloc initWithRootViewController:firstViewController];
     [navigationController setNavigationBarHidden:YES];
 
@@ -30,4 +49,30 @@ - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(
     return YES;
 }
 
+// UIView animation changes the alpha of the blueImageView from current value to 0.0 (fully transparent)
+// This reveals the greenImageView behind the blueImageView
+- (void)fadeFromBlueToGreenImage
+{
+    [UIView animateWithDuration:2.5
+                          delay:0.0
+                        options:UIViewAnimationOptionBeginFromCurrentState
+                     animations:^{
+                         self.blueBGImageView.alpha = 0.0;
+                     }
+                     completion:nil];
+}
+
+// UIView animation changes the alpha of the blueImageView from current value to 1.0 (fully opaque)
+// This hides the greenImageView behind the blueImageView
+- (void)fadeFromGreenToBlueImage
+{
+    [UIView animateWithDuration:2.5
+                          delay:0.0
+                        options:UIViewAnimationOptionBeginFromCurrentState
+                     animations:^{
+                         self.blueBGImageView.alpha = 1.0;
+                     }
+                     completion:nil];
+}
+
 @end
diff --git a/ChangingBackground/ChangingBackground-Prefix.pch b/ChangingBackground/ChangingBackground-Prefix.pch
index 4a89986..9b44dc7 100644
--- a/ChangingBackground/ChangingBackground-Prefix.pch
+++ b/ChangingBackground/ChangingBackground-Prefix.pch
@@ -11,4 +11,8 @@
 #ifdef __OBJC__
     #import <UIKit/UIKit.h>
     #import <Foundation/Foundation.h>
+    #import "AppDelegate.h"
 #endif
+
+//Adding a Macro to access the AppDelegate easily in other programs
+#define APPDELEGATE ((AppDelegate*)[[UIApplication sharedApplication] delegate])
diff --git a/ChangingBackground/FirstViewController.m b/ChangingBackground/FirstViewController.m
index 8aedb68..06f9e7e 100644
--- a/ChangingBackground/FirstViewController.m
+++ b/ChangingBackground/FirstViewController.m
@@ -8,6 +8,7 @@
 
 #import "FirstViewController.h"
 #import "SecondViewController.h"
+#import "UINavigationController+CustomTransition.h"
 
 @interface FirstViewController ()
 
@@ -17,7 +18,11 @@ @implementation FirstViewController
 
 - (IBAction)goForwardButtonPressed {
     SecondViewController *secondViewController = SecondViewController.new;
-    [self.navigationController pushViewController:secondViewController animated:YES];
+    
+    //Using the customTransiton method from UINavigationController's CustomTransition category
+    [self.navigationController pushViewControllerWithCustomTansition:secondViewController];
+    
+    [APPDELEGATE fadeFromBlueToGreenImage];
 }
 
 @end
diff --git a/ChangingBackground/FirstViewController.xib b/ChangingBackground/FirstViewController.xib
index 0dd58c2..824cb81 100644
--- a/ChangingBackground/FirstViewController.xib
+++ b/ChangingBackground/FirstViewController.xib
@@ -1,217 +1,41 @@
-<?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="13C1021" 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="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" minimumScaleFactor="0.5" id="4">
+                    <rect key="frame" x="77" y="115" width="166" 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="102" y="180" width="109" height="44"/>
+                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                    <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="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+            <simulatedStatusBarMetrics key="simulatedStatusBarMetrics"/>
+            <simulatedScreenMetrics key="simulatedDestinationMetrics" type="retina4"/>
+        </view>
+    </objects>
+</document>
diff --git a/ChangingBackground/SecondViewController.m b/ChangingBackground/SecondViewController.m
index 028f811..b0716b1 100644
--- a/ChangingBackground/SecondViewController.m
+++ b/ChangingBackground/SecondViewController.m
@@ -7,12 +7,14 @@
 //
 
 #import "SecondViewController.h"
-
+#import "UINavigationController+CustomTransition.h"
 
 @implementation SecondViewController
 
 - (IBAction)goBackButtonPressed {
-    [self.navigationController popViewControllerAnimated:YES];
+    //Using the customTransiton method from UINavigationController's CustomTransition category
+    [self.navigationController popViewControllerWithCustomTansition];
+    [APPDELEGATE fadeFromGreenToBlueImage];
 }
 
 @end
diff --git a/ChangingBackground/SecondViewController.xib b/ChangingBackground/SecondViewController.xib
index d603949..a36dd07 100644
--- a/ChangingBackground/SecondViewController.xib
+++ b/ChangingBackground/SecondViewController.xib
@@ -1,243 +1,41 @@
-<?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>
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-		</object>
-		<array key="IBDocument.IntegratedClassDependencies">
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-			<string>IBUILabel</string>
-			<string>IBUIView</string>
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-		<array key="IBDocument.PluginDependencies">
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-		<object class="NSMutableDictionary" key="IBDocument.Metadata">
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-		<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>
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-			<object class="IBUIView" id="191373211">
-				<reference key="NSNextResponder"/>
-				<int key="NSvFlags">274</int>
-				<array class="NSMutableArray" key="NSSubviews">
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-						<reference key="NSNextResponder" ref="191373211"/>
-						<int key="NSvFlags">292</int>
-						<string key="NSFrame">{{71, 118}, {209, 21}}</string>
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-						<reference key="NSWindow"/>
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-						<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">
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-						<reference key="object" ref="296395786"/>
-						<reference key="parent" ref="191373211"/>
-					</object>
-					<object class="IBObjectRecord">
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-						<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="13C1021" 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="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" minimumScaleFactor="0.5" id="7">
+                    <rect key="frame" x="71" 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="130" y="180" width="60" height="44"/>
+                    <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMaxY="YES"/>
+                    <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="0.0" alpha="0.0" colorSpace="calibratedWhite"/>
+            <simulatedStatusBarMetrics key="simulatedStatusBarMetrics"/>
+            <simulatedScreenMetrics key="simulatedDestinationMetrics" type="retina4"/>
+        </view>
+    </objects>
+</document>
diff --git a/ChangingBackground/UINavigationController+CustomTransition.h b/ChangingBackground/UINavigationController+CustomTransition.h
new file mode 100644
index 0000000..0502fdb
--- /dev/null
+++ b/ChangingBackground/UINavigationController+CustomTransition.h
@@ -0,0 +1,16 @@
+//
+//  UINavigationController+CustomTransition.h
+//  ChangingBackground
+//
+//  Created by Jomis Kakozhayil on 01/05/14.
+//  Copyright (c) 2014 Ora Interactive. All rights reserved.
+//
+
+#import <UIKit/UIKit.h>
+
+@interface UINavigationController (CustomTransition)
+
+- (void)pushViewControllerWithCustomTansition:(UIViewController *)viewController;
+- (void)popViewControllerWithCustomTansition;
+
+@end
diff --git a/ChangingBackground/UINavigationController+CustomTransition.m b/ChangingBackground/UINavigationController+CustomTransition.m
new file mode 100644
index 0000000..92ea3da
--- /dev/null
+++ b/ChangingBackground/UINavigationController+CustomTransition.m
@@ -0,0 +1,43 @@
+//
+//  UINavigationController+CustomTransition.m
+//  ChangingBackground
+//
+//  Created by Jomis Kakozhayil on 01/05/14.
+//  Copyright (c) 2014 Ora Interactive. All rights reserved.
+//
+
+#import "UINavigationController+CustomTransition.h"
+
+@implementation UINavigationController (CustomTransition)
+
+- (void)pushViewControllerWithCustomTansition:(UIViewController *)viewController
+{
+    CATransition *transition = [CATransition animation];
+    
+    transition.duration = 0.25;
+    transition.type = kCATransitionPush;
+    transition.subtype = kCATransitionFromRight;
+    
+    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
+    
+    [self.view.layer addAnimation:transition forKey:@"customTransitionPush"];
+    
+    [self pushViewController:viewController animated:NO];
+}
+
+- (void)popViewControllerWithCustomTansition
+{
+    CATransition *transition = [CATransition animation];
+    
+    transition.duration = 0.25;
+    transition.type = kCATransitionPush;
+    transition.subtype = kCATransitionFromLeft;
+    
+    transition.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
+    
+    [self.view.layer addAnimation:transition forKey:@"customTransitionPop"];
+    
+    [self popViewControllerAnimated:NO];
+}
+
+@end