diff --git a/.travis.yml b/.travis.yml
index dff5f3a..9bcf999 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1 +1,3 @@
 language: java
+jdk:
+  - oraclejdk8
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..17aa213
--- /dev/null
+++ b/README.md
@@ -0,0 +1,6 @@
+jax-ftd-day-4-java-assignment
+===
+
+
+
+[![Build Status](https://travis-ci.org/arturlan/jax-ftd-day-4-java-assignment.svg?branch=arturlan)](https://travis-ci.org/arturlan/jax-ftd-day-4-java-assignment)
diff --git a/src/main/java/com/cooksys/butterpillar/model/Butterpillar.java b/src/main/java/com/cooksys/butterpillar/model/Butterpillar.java
index 1060573..998cfdf 100644
--- a/src/main/java/com/cooksys/butterpillar/model/Butterpillar.java
+++ b/src/main/java/com/cooksys/butterpillar/model/Butterpillar.java
@@ -3,32 +3,53 @@
 public class Butterpillar {
 	
 	// any instance fields should be private
+	private double length;
+	private double leavesEaten;
+
+	public Butterpillar() {
+		
+	}
+	
+	
+	
+	public Butterpillar(double length, double leavesEaten) {
+		super();
+		this.length = length;
+		this.leavesEaten = leavesEaten;
+	}
+
+
 
 	public double getLength() {
-		return 0; // TODO: to be implemented
+		return length;
 	}
 
 	public void setLength(double length) {
-		// TODO: to be implemented
+		this.length = length;
 	}
 
 	public double getLeavesEaten() {
-		return 0; // TODO: to be implemented
+		return leavesEaten;
 	}
 
 	public void setLeavesEaten(double leavesEaten) {
-		// TODO: to be implemented
+		this.leavesEaten = leavesEaten;
 	}
-	
+
 	public boolean equals(Butterpillar b) {
+		if(b.length == length && b.leavesEaten == leavesEaten) {
+			return true;
+		}
 		return false; // TODO: to be implemented
 	}
 	
+	
+	
 	@Override
 	public String toString() {
-		return null; // TODO: to be implemented
+		return "Butterpillar [length=" + length + ", leavesEaten=" + leavesEaten + "]";
 	}
-	
+
 	@Override
 	public boolean equals(Object o) {
 		if (o instanceof Butterpillar) {
diff --git a/src/main/java/com/cooksys/butterpillar/model/Catterfly.java b/src/main/java/com/cooksys/butterpillar/model/Catterfly.java
index 81ff09a..ab8d4f8 100644
--- a/src/main/java/com/cooksys/butterpillar/model/Catterfly.java
+++ b/src/main/java/com/cooksys/butterpillar/model/Catterfly.java
@@ -3,32 +3,53 @@
 public class Catterfly {
 	
 	// any instance fields should be private
+	private double wingspan;
+	private double weight;
+
+	public Catterfly() {
+		
+	}
+
+	
+	
+	public Catterfly(double wingspan, double weight) {
+		super();
+		this.wingspan = wingspan;
+		this.weight = weight;
+	}
+
+
 
 	public double getWingspan() {
-		return 0; // to be implemented
+		return wingspan;
 	}
 
 	public void setWingspan(double wingspan) {
-		// to be implemented
+		this.wingspan = wingspan;
 	}
 
 	public double getWeight() {
-		return 0; // TODO: to be implemented
+		return weight;
 	}
 
 	public void setWeight(double weight) {
-		// TODO: to be implemented
+		this.weight = weight;
 	}
 	
+
 	public boolean equals(Catterfly c) {
+		if (c.wingspan == wingspan && c.weight == weight) {
+			return true;
+		}
 		return false; // TODO: to be implemented
 	}
 	
+	
 	@Override
 	public String toString() {
-		return null; // TODO: to be implemented
+		return "Catterfly [wingspan=" + wingspan + ", weight=" + weight + "]";
 	}
-	
+
 	@Override
 	public boolean equals(Object o) {
 		if (o instanceof Catterfly) {
diff --git a/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java b/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java
index 3f034fd..2e07675 100644
--- a/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java
+++ b/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java
@@ -3,40 +3,43 @@
 public class GrowthModel {
 
 	// any instance fields should be private
+	private double lengthToWingspan;
+	private double leavesEatenToWeight;
 
 	public double getLengthToWingspan() {
-		return 0; // to be implemented
+		return lengthToWingspan;
 	}
 
 	public void setLengthToWingspan(double lengthToWingspan) {
-		// to be implemented
+		this.lengthToWingspan = lengthToWingspan;
 	}
 
 	public double getLeavesEatenToWeight() {
-		return 0; // to be implemented
+		return leavesEatenToWeight;
 	}
 
 	public void setLeavesEatenToWeight(double leavesEatenToWeight) {
-		// to be implemented
+		this.leavesEatenToWeight = leavesEatenToWeight;
 	}
 
 	public Catterfly butterpillarToCatterfly(Butterpillar butterpillar) {
-		return null; // to be implemented
+		return new Catterfly(butterpillar.getLength() * lengthToWingspan,
+				butterpillar.getLeavesEaten() * leavesEatenToWeight); 
 	}
 
 	public Butterpillar catterflyToButterpillar(Catterfly catterfly) {
-		return null; // to be implemented
+		return new Butterpillar(catterfly.getWingspan() / lengthToWingspan, catterfly.getWeight() / leavesEatenToWeight); 
 	}
-	
+
 	public boolean equals(GrowthModel g) {
 		return false; // TODO: to be implemented
 	}
-	
+
 	@Override
 	public String toString() {
 		return null; // TODO: to be implemented
 	}
-	
+
 	@Override
 	public boolean equals(Object o) {
 		if (o instanceof GrowthModel) {