I heard you like gliders.

Grid doesn't work if dimensions are rectangular.

src/Goldfish.java

@@ -7,18 +7,22 @@ public class Goldfish {
     private Render _render;
 
     public Goldfish() {
-    	int height = 128;
-    	int width = 128;
+        int width = 128;
+        int height = 128;
         _grid = new Grid(width, height);
         _render = new Render(width, height, _grid);
     }
 
     public void run() {
-        _grid.getPatch(1,0).setState(1);
-        _grid.getPatch(2,1).setState(1);
-        _grid.getPatch(2,2).setState(1);
-        _grid.getPatch(1,2).setState(1);
-        _grid.getPatch(0,2).setState(1);
+        for (int i = 0; i < _grid.getWidth(); i += 16) {
+            for (int j = 0; j < _grid.getHeight(); j += 16) {
+                _grid.getPatch(i + 1, j + 0).setState(1);
+                _grid.getPatch(i + 2, j + 1).setState(1);
+                _grid.getPatch(i + 2, j + 2).setState(1);
+                _grid.getPatch(i + 1, j + 2).setState(1);
+                _grid.getPatch(i + 0, j + 2).setState(1);
+            }
+        }
 
         while (true) {
             _grid = Conway.run(_grid);
@@ -26,9 +30,9 @@ public class Goldfish {
             _render.run();
             _render.sleep();
         }
-   }
+    }
 
-    public static void main (String[] args) {
+    public static void main(String[] args) {
         Goldfish g = new Goldfish();
         g.run();
     }

src/Render.java

@@ -128,8 +128,11 @@ public class Render extends Canvas implements Runnable, MouseListener,
 
 	@Override
 	public void mouseDragged(MouseEvent e) {
-		_grid.getPatch(e.getX() / scale, e.getY() / scale).setState(1);
-		draw(e.getX() / scale, e.getY() / scale, 0xffffff);
+		try {
+			_grid.getPatch(e.getX() / scale, e.getY() / scale).setState(1);
+			draw(e.getX() / scale, e.getY() / scale, 0xffffff);
+		} catch (ArrayIndexOutOfBoundsException exception) {
+		}
 		e.consume();
 	}
 
@@ -139,26 +142,21 @@ public class Render extends Canvas implements Runnable, MouseListener,
 
 	@Override
 	public void mouseEntered(MouseEvent e) {
-		// TODO Auto-generated method stub
 	}
 
 	@Override
 	public void mouseExited(MouseEvent e) {
-		// TODO Auto-generated method stub
 	}
 
 	@Override
 	public void mousePressed(MouseEvent e) {
-		// TODO Auto-generated method stub
 	}
 
 	@Override
 	public void mouseReleased(MouseEvent e) {
-		// TODO Auto-generated method stub
 	}
 
 	@Override
 	public void mouseMoved(MouseEvent e) {
-		// TODO Auto-generated method stub
 	}
 }