import java.applet.*;
import java.awt.*;


public class BallBounce extends Applet
 {

	 public void init()
	  {setSize(800,600);
   }

	 public void paint (Graphics g)
	   {
	    for (int x=0; x <= 800; x+=20)
	      {g.setColor(Color.red);
		   g.fillOval(x,150,10,10);

	       for (int y=1; y<=100000000;y++);
	       g.setColor(Color.white);
			  g.fillOval(x,150,10,10);

	   }
   }
}