http://java.sun.com/j2se/1.4.2/docs/...eListener.html

Thats the Javadoc for MouseListener. Now, you tell me, what method should your code go if you want something to happen when the user clicks the mouse?

I know the code goes in mouseClicked(MouseEvent e)
My question is what would my code be like in that method? any help, sir???

I'm really not sure how you would do that. You should look into the documentation for the various methods you've been using, such as the ones that you are currently using in your paint method. For example, what would happen if you set both the rectangle's length and width to 0 then called repaint? It seems like this would lead to a rectangle with 0 area, which would be painted as nothing on your screen. That probably isn't the best way to go about things, in fact - probably the worst way you could do it - but it will probably work. If you want a better solution, which I'd hope you do, then look into the methods you are using. They have documentation which tells you what happens based on the parameters.