import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
public class Ring extends Applet implements MouseListener{
    int x,y,i,u;
  public void init(){
    addMouseListener(this);
  }

  public void paint(Graphics g){
    g.setColor(Color.red);
    g.drawLine(0,20,200,220);
    g.drawLine(200,220,400,220);
  }

  public void mousePressed(MouseEvent e){
    x=e.getX();
    y=e.getY();
    if(x<150 && y<150 && (x-y)<1){
    Graphics v=getGraphics();
    for(i=0;i<(200-x);i++){
      v.setColor(Color.red);
      v.drawLine(0,20,200,220);
      v.fillOval(x+i,y+i,20,20);
      try{Thread.sleep(10-(i/20));}catch(Exception r){}
      v.setColor(Color.white);
      v.fillOval(x+i,y+i,20,20);
     } 
     for(u=0;u<200;u++){
      v.setColor(Color.red);
      v.drawLine(200,220,400,220);
      v.fillOval(x+i+u,y+i,20,20);
      try{Thread.sleep(1+i/5);}catch(Exception r){}
      v.setColor(Color.white);
      v.fillOval(x+i+u,y+i,20,20);
     } 
    }
}
  public void mouseReleased(MouseEvent e){}
  public void mouseExited(MouseEvent e){}
  public void mouseEntered(MouseEvent e){}
  public void mouseClicked(MouseEvent e){}
}