diff --git a/src/main/java/io/zipcoder/Problem2.java b/src/main/java/io/zipcoder/Problem2.java
index e0af6a0..7499152 100644
--- a/src/main/java/io/zipcoder/Problem2.java
+++ b/src/main/java/io/zipcoder/Problem2.java
@@ -1,4 +1,48 @@
 package io.zipcoder;
 
+import java.util.ArrayList;
+
 public class Problem2 {
+    ArrayList<Integer> lisOfIntegers = new ArrayList<Integer>();
+    StringBuilder numberSequence = new StringBuilder();
+
+    public String fibonacciIteration(int number){
+
+        int[] fibonacciSeries = new int[number];
+        fibonacciSeries[0] = 0;
+        fibonacciSeries[1] = 1;
+        numberSequence.append(fibonacciSeries[0]);
+        //numberSequence.append(", "+ fibonacciSeries[1]);
+
+        for (int i = 2; number > fibonacciSeries[i - 1]; i++){
+            fibonacciSeries[i] = fibonacciSeries[i - 1] + fibonacciSeries [i - 2];
+            numberSequence.append(", " + fibonacciSeries[i - 1]);
+
+        }
+
+        return numberSequence.toString();
+    }//works, but not efficient
+
+    public String fibonacciIterationArrayList(int number){
+        //lisOfIntegers.add(0);
+        //lisOfIntegers.add(1);
+        for (int x = 0; x < number; x++){
+            lisOfIntegers.add(x);
+        }
+        numberSequence.append(lisOfIntegers.get(0));
+        numberSequence.append(", " + lisOfIntegers.get(1));
+        int previousIndex = 0;
+        int currentIndex = 1;
+        int fibNumber;
+
+        for (int i = 0; currentIndex < lisOfIntegers.size()- previousIndex ; i++){
+            fibNumber = previousIndex + currentIndex;
+            numberSequence.append(", " + fibNumber);
+            previousIndex = currentIndex;
+            currentIndex = fibNumber;
+
+        }
+        return numberSequence.toString();
+    }
+
 }
diff --git a/src/test/java/io/zipcoder/Problem2Test.java b/src/test/java/io/zipcoder/Problem2Test.java
index fa9ffa5..4cccb0e 100644
--- a/src/test/java/io/zipcoder/Problem2Test.java
+++ b/src/test/java/io/zipcoder/Problem2Test.java
@@ -1,4 +1,32 @@
 package io.zipcoder;
 
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
 public class Problem2Test {
+
+    private Problem2 problem2;
+    private int number;
+
+    @Before
+    public void setUp() {
+        number = 150;
+        problem2 = new Problem2();
+
+    }
+    @Test
+    public void fibonacciIterationTest(){
+        String expected = "0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144";
+        String actual = problem2.fibonacciIteration(number);
+        Assert.assertEquals(expected, actual);
+    }
+
+    @Test
+    public void fibItArrayListTest(){
+        String expected = "0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144";
+        String actual = problem2.fibonacciIterationArrayList(number);
+        Assert.assertEquals(expected, actual);
+
+    }
 }