diff --git a/lab1/Collatz.java b/lab1/Collatz.java
index ddca4e8..9d33650 100644
--- a/lab1/Collatz.java
+++ b/lab1/Collatz.java
@@ -2,10 +2,26 @@
  *  @author YOUR NAME HERE
  */
 public class Collatz {
+
+    /** Buggy implementation of nextNumber! */
+    public static int nextNumber(int n) {
+        if (n  == 128) {
+            return 1;
+        } else if (n == 5) {
+            return 3 * n + 1;
+        } else {
+            return n * 2;
+        }
+    }
+
     public static void main(String[] args) {
         int n = 5;
         System.out.print(n + " ");
-
+        while (n != 1) {
+            n = nextNumber(n);
+            System.out.print(n + " ");
+        }
+        System.out.println();
     }
 }
 
diff --git a/lab4/flik/Flik.java b/lab4/flik/Flik.java
new file mode 100644
index 0000000..27f5bc6
--- /dev/null
+++ b/lab4/flik/Flik.java
@@ -0,0 +1,13 @@
+package flik;
+
+/** An Integer tester created by Flik Enterprises.
+ * @author Josh Hug
+ * */
+public class Flik {
+    /** @param a Value 1
+     *  @param b Value 2
+     *  @return Whether a and b are the same */
+    public static boolean isSameNumber(Integer a, Integer b) {
+        return a == b;
+    }
+}
diff --git a/lab4/flik/HorribleSteve.java b/lab4/flik/HorribleSteve.java
new file mode 100644
index 0000000..3c435fd
--- /dev/null
+++ b/lab4/flik/HorribleSteve.java
@@ -0,0 +1,14 @@
+package flik;
+
+public class HorribleSteve {
+    public static void main(String [] args) throws Exception {
+        int i = 0;
+        for (int j = 0; i < 500; ++i, ++j) {
+            if (!Flik.isSameNumber(i, j)) {
+                throw new Exception(
+                        String.format("i:%d not same as j:%d ??", i, j));
+            }
+        }
+        System.out.println("i is " + i);
+    }
+}
diff --git a/lab4/pom.xml b/lab4/pom.xml
new file mode 100644
index 0000000..eba0263
--- /dev/null
+++ b/lab4/pom.xml
@@ -0,0 +1,44 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>CS61B</groupId>
+        <artifactId>61BMasterPom</artifactId>
+        <version>1.0-SNAPSHOT</version>
+        <relativePath>../library-sp21/javalib/masterpom.xml</relativePath>
+    </parent>
+
+    <groupId>CS61B</groupId>
+    <artifactId>lab4</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <build>
+        <sourceDirectory>${project.basedir}</sourceDirectory>
+        <testSourceDirectory>${project.basedir}</testSourceDirectory>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.1</version>
+                <configuration>
+                    <source>1.14</source>
+                    <target>1.14</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <compilerArgs>
+                        <arg>-J-XX:+ShowCodeDetailsInExceptionMessages</arg>
+                    </compilerArgs>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+    
+</project>