i have to add clear screen option to my whiteboard application, usual procedure is to draw a fill rect to the sizeof the image. But in my app i have transparent panels added one above the other i.e as layers, if i follow the usual procedure the drawing from the underlying panel wont be visible. please tell me any logic to do this.

public void createFrame()

{   
    JFrame frame = new JFrame();
    JLayeredPane layerpane=frame.getLayeredPane();
    board= new Whiteboard(client); //board is a transparent panel 
    // tranparent image:
    board.image = new BufferedImage(590,690, BufferedImage.TYPE_INT_ARGB);
    board.setBounds(74,23,590,690);
    board.setImage(image);    
    virtualboard.setImage(image);  //virtualboardboard is a transparent panel 
    virtualboard.setBounds(74,23,590,690);
    JPanel background=new JPanel();
    background.setBackground(Color.white);
    background.setBounds(74,25,590,685);
    layerpane.add(board,new Integer(5));
    layerpane.add(virtualboard,new Integer(4));//Panel where remote user draws
    layerpane.add(background,new Integer(3));
    layerpane.add(board.colourButtons(),new Integer(2));
    layerpane.add(board.shapeButtons(),new Integer(1));
    layerpane.add(board.createEmptyPanel(),new Integer(0));
}