import java.awt.*;
import java.util.Random;
import java.applet.Applet;

public class SimpleGame extends Applet implements Runnable {
        public int x;
        public int y;
        public void init() {
                setBackground(Color.black);
        }
        public void run() {
                Random rand = new Random();
                try {
                        while (true) {
                                x = rand.nextInt(20);
                                y = rand.nextInt(20);
                                Thread.sleep(20);
                                repaint();
                        }
                } catch (Exception e) {}
        }
        public void mouseClicked(Event e, int x, int y) {}
        public void paint(Graphics g) {
                g.setColor(Color.green);
                g.fillOval(x,y,20,20);
        }
}