Program To Change Colors Of A Shape In Other Window

I was working on this project, and I have everything working, except that it doesn't change the colors of the shapes in the other window. Here's the code to see what I'm doing wrong:

Java Code:

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class JDemo {
//Global Variables
static Color color0 = Color.blue; //sets the value in the color0 variable to the method Color.blue .
static Color color1 = Color.red; //Sets the value in the color1 variable to the method Color.red .

[Code] ....

The button0 is supposed to switch the color in window1, and button1 is supposed to switch the color in window0.