public void paintComponent(Graphics g) {
   super.paintComponent(g);
	            
    // Draw left circle.
    g.setColor(new Color(0x804030, false));
    g.fillOval(20, 20, 150, 150);
    g.setColor(Color.black);
    g.drawOval(20, 20, 150, 150);
                     
    // Draw right circle.
    g.setColor(new Color(0xe0e0ff, false));
    g.fillOval(170, 20, 150, 150);
    g.setColor(Color.black);
    g.drawOval(170, 20, 150, 150);
}