stuff.java

import java.awt.*;
import java.util.*;
import javax.swing.*;
/**
 * An applet to create a mood ring
 */

public class MoodRingApplet extends JApplet{
  public void paint(Graphics page) {
    Random generator = new Random();
    Color ringColor = new Color(generator.nextInt(256), generator.nextInt(256), generator.nextInt(256));
    Color backgroundColor = Color.black;
    int width = getWidth();
    int height = getHeight();
    int ringWidth = generator.nextInt(10) + 5;
    int innerRadius = generator.nextInt(Math.min(width, height)/2 - ringWidth);
    int outerRadius = innerRadius + ringWidth;

    // Draw black background
    page.setColor(backgroundColor);
    page.fillRect(0, 0, width, height);

    page.setColor(ringColor);
    page.fillOval(width/2 - outerRadius, height/2 - outerRadius, outerRadius*2, outerRadius*2);

    page.setColor(backgroundColor);
    page.fillOval(width/2 - innerRadius, height/2 - innerRadius, innerRadius*2, innerRadius*2);

    Timer t = new Timer(1000, new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        page.repaint();
      }
    });
  }
}