import java.applet.*

clas* ball extends Applet implements Runnable

int x= 20; int y=20;
int radius = 20;
public void init()

Thread t = new Thread(this);
t.start;

public void run()
while(true)

x++;
repaint();
try
t.sleep(200);
catch(InterruptedException e)





public void paint(Graphics g)
g.setColor(Color,red);
g.fillOval(x-r,y-r,r*2,r*2);