import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;
import javax.swing.*;
public class EventTester extends java.applet.Applet implements MouseListener{

int r,g,b,akt,x1,y1;
Color c;
public void mouseClicked(MouseEvent evt){
java.util.Random rand = new java.util.Random();
r = rand.nextInt(255);
g = rand.nextInt(255);
b = rand.nextInt(255);
c = new Color(r, g, b);
akt=rand.nextInt(100);
x1=evt.getX()-akt;
y1=evt.getY()-akt;
Graphics g=getGraphics();
paint(g);
}
public void mouseExited(MouseEvent ev){
         }
public void mouseEntered(MouseEvent ev){}
public void mousePressed(MouseEvent ev){}
public void mouseReleased(MouseEvent ev){}
public void start(){
addMouseListener(this);
}
 public void paint(Graphics g){
     
     Graphics2D g1 = (Graphics2D) g;
       g1.setColor(c);
         g1.fillOval(x1,y1,2*akt,2*akt);}
    }