import java.awt.*;
import java.awt.image.*;
class Main {
    static final int X = 512, Y = 512;
    static BufferedImage I = new BufferedImage(X, Y, BufferedImage.TYPE_INT_RGB);
    static int xi = 20, yi = 20;
    static class MainCanvas extends Canvas {
      public void paint(Graphics g){
       g.drawImage(Main.I, 0, 0, Color.red, null);
       g.clearRect(xi, yi, 17, 12);
       }}

    static public void main( String[] args ){
        Frame f = new Frame( "paint Example" );
        Canvas can = new MainCanvas();
        f.add(can, "Center");
        f.setSize(new Dimension(X,Y+22));
        WritableRaster wr = I.getRaster();
        int[] a = new int[3];
        for(int z = 0; z<256; z += 16) {a[2] = z;
           for(int j = 0; j<Y-40; ++j) {a[1] = j;
           for(int i = 0; i<X-40; ++i) {a[0] = i;
              wr.setPixel(20+i, 20+j, a);}}
        f.setVisible(true);
        can.repaint(); xi += 10; yi += 15;
       // System.out.println("gg");
       }
   }
}