buttonPanel.add(iterationButton = new JButton("Iteration"));
buttonPanel.add(startButton = new JButton("Start"));
buttonPanel.add(stopButton = new JButton("Stop"));
buttonPanel.add(resetButton = new JButton("Reset"));
this.worldArea = new WorldPanel(ROWS, COLS, true);
/*
Scroll bar.
*/
final JScrollPane scroll = new JScrollPane(this.worldArea);
c.add(scroll, BorderLayout.CENTER);