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..2e92b9c
--- /dev/null
+++ b/README.md
@@ -0,0 +1,4 @@
+jax-ftd-day-4-java-assignment
+===
+
+[![Build Status](https://travis-ci.org/dmurphy326/jax-ftd-day-4-java-assignment.svg?branch=dmurphy326)](https://travis-ci.org/dmurphy326/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..751a38b 100644
--- a/src/main/java/com/cooksys/butterpillar/model/Butterpillar.java
+++ b/src/main/java/com/cooksys/butterpillar/model/Butterpillar.java
@@ -1,34 +1,47 @@
 package com.cooksys.butterpillar.model;
 
 public class Butterpillar {
-	
-	// any instance fields should be private
+
+	private double length, leavesEaten;
+
+	public Butterpillar() {
+
+	}
+
+	public Butterpillar(double length, double leavesEaten) {
+		setLength(length);
+		setLeavesEaten(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) {
-		return false; // TODO: to be implemented
+		if (this.length == b.length && this.leavesEaten == b.leavesEaten) {
+			return true;
+		} else {
+			return false;
+		}
 	}
-	
+
 	@Override
 	public String toString() {
-		return null; // TODO: to be implemented
+		return "Butterpillar: " + this.length + ", " + this.leavesEaten;
 	}
-	
+
 	@Override
 	public boolean equals(Object o) {
 		if (o instanceof Butterpillar) {
@@ -37,7 +50,5 @@ public boolean equals(Object o) {
 			return false;
 		}
 	}
-	
-	
 
-}
+}
\ No newline at end of file
diff --git a/src/main/java/com/cooksys/butterpillar/model/Catterfly.java b/src/main/java/com/cooksys/butterpillar/model/Catterfly.java
index 81ff09a..048bc16 100644
--- a/src/main/java/com/cooksys/butterpillar/model/Catterfly.java
+++ b/src/main/java/com/cooksys/butterpillar/model/Catterfly.java
@@ -2,31 +2,48 @@
 
 public class Catterfly {
 	
-	// any instance fields should be private
+	private double wingspan, weight;
+	
+	public Catterfly()
+	{
+		
+	}
+	
+	public Catterfly(double wingspan, double weight)
+	{
+		setWingspan(wingspan);
+		setWeight(weight);
+	}
 
 	public double getWingspan() {
-		return 0; // to be implemented
+		return wingspan; // to be implemented
 	}
 
 	public void setWingspan(double wingspan) {
-		// to be implemented
+		this.wingspan = wingspan;
 	}
 
 	public double getWeight() {
-		return 0; // TODO: to be implemented
+		return weight; // TODO: to be implemented
 	}
 
 	public void setWeight(double weight) {
-		// TODO: to be implemented
+		this.weight = weight;
 	}
 	
 	public boolean equals(Catterfly c) {
-		return false; // TODO: to be implemented
+		if(this.wingspan == c.wingspan && this.weight == c.weight)
+		{
+			return true;
+		}else
+		{
+			return false;
+		}
 	}
 	
 	@Override
 	public String toString() {
-		return null; // TODO: to be implemented
+		return "Catterfly: " + this.wingspan + ", " + this.weight; 
 	}
 	
 	@Override
@@ -38,4 +55,4 @@ public boolean equals(Object o) {
 		}
 	}
 
-}
+}
\ No newline at end of file
diff --git a/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java b/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java
index 3f034fd..e0aba70 100644
--- a/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java
+++ b/src/main/java/com/cooksys/butterpillar/model/GrowthModel.java
@@ -2,41 +2,51 @@
 
 public class GrowthModel {
 
-	// any instance fields should be private
+	private double lengthToWingspan, leavesEatenToWeight;
 
 	public double getLengthToWingspan() {
-		return 0; // to be implemented
+		return lengthToWingspan; // to be implemented
 	}
 
 	public void setLengthToWingspan(double lengthToWingspan) {
-		// to be implemented
+		this.lengthToWingspan = lengthToWingspan;
 	}
 
 	public double getLeavesEatenToWeight() {
-		return 0; // to be implemented
+		return leavesEatenToWeight; // to be implemented
 	}
 
 	public void setLeavesEatenToWeight(double leavesEatenToWeight) {
-		// to be implemented
+		this.leavesEatenToWeight = leavesEatenToWeight;
 	}
 
 	public Catterfly butterpillarToCatterfly(Butterpillar butterpillar) {
-		return null; // to be implemented
+		double wingspan = butterpillar.getLength() * this.lengthToWingspan;
+		double weight = butterpillar.getLeavesEaten() * this.leavesEatenToWeight;
+
+		return new Catterfly(wingspan, weight);
 	}
 
 	public Butterpillar catterflyToButterpillar(Catterfly catterfly) {
-		return null; // to be implemented
+		double length = catterfly.getWingspan() / this.lengthToWingspan;
+		double leavesEaten = catterfly.getWeight() / this.leavesEatenToWeight;
+
+		return new Butterpillar(length, leavesEaten);
 	}
-	
+
 	public boolean equals(GrowthModel g) {
-		return false; // TODO: to be implemented
+		if (g.leavesEatenToWeight == this.leavesEatenToWeight && g.lengthToWingspan == this.lengthToWingspan) {
+			return true;
+		} else {
+			return false;
+		}
 	}
-	
+
 	@Override
 	public String toString() {
 		return null; // TODO: to be implemented
 	}
-	
+
 	@Override
 	public boolean equals(Object o) {
 		if (o instanceof GrowthModel) {
@@ -46,4 +56,4 @@ public boolean equals(Object o) {
 		}
 	}
 
-}
+}
\ No newline at end of file