import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;

public class Klahv extends Applet implements MouseListener{
  int x=100;
  int y=100;
  
  public Klahv(){
    addMouseListener(this);
  }
  public void paint(Graphics g){
  	g.setColor(Color.red);
    g.fillOval(x-5, y-5, 10, 10);
  }
  public void mousePressed(MouseEvent e){
    x=e.getX();
    y=e.getY();
    repaint();
  }
  public void mouseReleased(MouseEvent e){
    Graphics g=Klahv.this.getGraphics();
    g.setColor(Color.white);
    g.fillOval(x-5, y-5, 10, 10);
  }
  public void mouseClicked(MouseEvent e){}
  public void mouseEntered(MouseEvent e){}
  public void mouseExited(MouseEvent e){}

  public static void main(String[] argumendid){
    Frame f=new Frame();
    f.add(new Klahv());
    f.setSize(200, 200);
    f.setVisible(true);
  }
}