Color Cycle Test

TheApp.java

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

/**
 * Created with IntelliJ IDEA.
 * User: seronis
 * Date: 11/15/12
 * Time: 2:55 PM
 */
public class TheApp extends JFrame
    implements ActionListener
{
    private int value=0;
    private JPanel panel;

    public TheApp() {
        initUI();
    }

    private void initUI() {
        panel = new JPanel();
        panel.setLayout(null);
        add(panel);

        setTitle("Color Cycling");
        setSize(1165,288);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        setVisible(true);

        for(int mode=0;mode<3;++mode)
        for(int zloop=0; zloop<5; ++zloop){
            RGDisplay rgbp = new RGDisplay(zloop,mode);
            rgbp.setSize(200,200);
            rgbp.setLocation(25+(zloop*225),25+(mode*225));
            panel.add(rgbp);
        }

        Timer timer = new Timer(100,this);
        timer.setRepeats(true);
        timer.start();
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                TheApp window = new TheApp();
            }
        });
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        int rr = ((value   )%5);
        int gg = ((value/ 5)%5);
        int bb = ((value/25)%5);
        if(value<125) {
            setTitle(" R:" + rr + " G:" + gg + " B:" + bb);
            panel.setBackground(new Color(255*(rr)/4,255*(gg)/4,255*(bb)/4));
        } else {
            setTitle("Color Cycle");
            panel.setBackground(Color.black);
        }
        value = (value+1)%256;
        repaint();
    }

    public class RGDisplay extends JPanel
    {
        private int zval;
        private int mode;

        public RGDisplay(int z, int m){
            zval = z;
            mode = m;
        }

        @Override
        protected void paintComponent(Graphics g) {
            for( int xval=0; xval<5; ++xval){
                int x1 = getWidth()*(xval+0)/5;
                for(int yval=0; yval<5; ++yval){
                    int y1 = getHeight()*(yval+0)/5;
                    switch(mode){
                        default:
                        case 0:
                            g.setColor(new Color(255*(xval)/4,255*(yval)/4,255*(zval)/4));
                            break;
                        case 1:
                            g.setColor(new Color(255*(xval)/4,255*(zval)/4,255*(yval)/4));
                            break;
                        case 2:
                            g.setColor(new Color(255*(zval)/4,255*(yval)/4,255*(xval)/4));
                            break;
                    }
                    g.fillRect(x1,y1,getWidth()/5,getHeight()/5);
                }
            }
        }
    }
}