import java.awt.*;
import javax.swing.*;

public class Applet8 extends JApplet
{

int x, b, a;
int p=1;
public void paint(Graphics g)
{
Thread t = new Thread();
g.drawRect(250,100,300,400);
for(a=492; a>=100; a=a-10)
{
if(p==0)
{
p=1;
x=251;
} 
else
{
p=0;
x=259;
}
for(b=1; b<=17; b=b+1)
{
g.drawRect(x,a,16,8);
x=x+18;
try{Thread.sleep(30);} catch(Exception e){} 
}
}
}

}