diff --git a/src/Grid.java b/src/Grid.java
index ca18d64..27d9466 100644
--- a/src/Grid.java
+++ b/src/Grid.java
@@ -6,14 +6,14 @@ public class Grid {
 
     public Grid() {
         _grid = new Patch[1][1];
-        _grid[0][0] = new Patch(this, 0, 0);
+        _grid[0][0] = new Patch(this, 0, 0, 0, "");
     }
 
     public Grid(int x, int y) {
         _grid = new Patch[x][y];
         for (int i = 0; i < x; i++) {
             for (int j = 0; j < y; j++) {
-                _grid[i][j] = new Patch(this, i, j);
+                _grid[i][j] = new Patch(this, i, j, 0, "");
             }
         }
     }
diff --git a/src/Patch.java b/src/Patch.java
index bcae989..d0daed9 100644
--- a/src/Patch.java
+++ b/src/Patch.java
@@ -46,7 +46,7 @@ public class Patch {
     }
 
     public String toString() {
-        return _plabel;
+        return _label;
     }
 
     public Patch[] get4Neighbors() {
@@ -55,6 +55,7 @@ public class Patch {
         neighbors[1] = _grid.getPatch(_xcor - 1, _ycor);
         neighbors[2] = _grid.getPatch(_xcor, _ycor + 1);
         neighbors[3] = _grid.getPatch(_xcor, _ycor - 1);
+        return neighbors;
     }
 
     public Patch[] get8Neighbors() {
@@ -67,6 +68,7 @@ public class Patch {
         neighbors[5] = _grid.getPatch(_xcor + 1, _ycor - 1);
         neighbors[6] = _grid.getPatch(_xcor - 1, _ycor + 1);
         neighbors[7] = _grid.getPatch(_xcor - 1, _ycor - 1);
+        return neighbors;
     }
 
     public Patch clone() {
diff --git a/src/rules/Conway.java b/src/rules/Conway.java
index 7b7b6a7..f9dfa15 100644
--- a/src/rules/Conway.java
+++ b/src/rules/Conway.java
@@ -3,14 +3,13 @@ package edu.stuy.goldfish.rules;
 import edu.stuy.goldfish.Grid;
 import edu.stuy.goldfish.Patch;
 
-public class Conway implements RuleSet {
-    states = 2;
+public class Conway extends RuleSet {
+    public static int states = 2;
 
-    @Override
     public static Grid run (Grid g) {
         Grid newGrid = new Grid(g.getWidth(), g.getHeight());
         for (int i = 0; i < g.getWidth(); i++) {
-            for (int j = 0; j < j.getHeight(); j++) {
+            for (int j = 0; j < g.getHeight(); j++) {
                 Patch[] neighbors = g.getPatch(i, j).get8Neighbors();
                 int numAlive = 0;
                 for (Patch p : neighbors)
diff --git a/src/rules/RuleSet.java b/src/rules/RuleSet.java
index 7609b30..236f7f9 100644
--- a/src/rules/RuleSet.java
+++ b/src/rules/RuleSet.java
@@ -2,8 +2,8 @@ package edu.stuy.goldfish.rules;
 
 import edu.stuy.goldfish.Grid;
 
-public interface RuleSet {
-    public static int states;
+public class RuleSet {
+    public static int states = 0;
 
     /**
      * Run this ruleset on a grid, returning the result.
@@ -12,6 +12,8 @@ public interface RuleSet {
      *
      * @return The new grid
      */
-    public static Grid run (Grid g);
+    public static Grid run (Grid g) {
+        return g;
+    }
 
 }