In java applet how do allow a user to click a rectangle and draw another rectangle.

[kingofdrew]

I want in java applet if a user clicks on a rectangle another one is draw.

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

public class stuff extends JApplet {

public void paint(Graphics g)
{
    super.paint(g);

    g.drawRect(40, 40, 200, 200);

    if(g.isSelected())
    {
        g.drawRect(20, 20, 50, 50);
    }
}

}