How to draw disappearing rectangles in Java

How to draw disappearing rectangles in Java

I want to make a program in Java. What I am trying to do is, when the user
click the screen a small square is drawn. One by one ten more squares are
displayed with the previous square in the center. When the sixth square is
drawn the first disappears, when the seventh square is drawn the second
square disappears etc. until all the squares are gone.
I have had problems with positioning, timing, and clearing the rectangles.
This is the MainActivity:
import java.awt.Color;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class MainActivity {
public static int width = 900;
public static int height = width / 16 * 9;
static HandlerClass handler = new HandlerClass();
static JFrame window;
static JPanel windowInner;
public static void main(String[] args) {
window = new JFrame("Squarmony 1.0");
window.setSize(width, height);
window.setVisible(true);
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
windowInner = new JPanel();
windowInner.setSize(width, height);
windowInner.setBackground(Color.BLACK);
window.add(windowInner);
windowInner.addMouseListener(handler);
}
private static class HandlerClass implements MouseListener {
@Override
public void mouseClicked(MouseEvent e) {
// TODO Auto-generated method stub
GraphicsActivity g = new GraphicsActivity();
g.drawRectRipple(window.getGraphics(), e);
}
@Override
public void mouseEntered(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseExited(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mousePressed(MouseEvent e) {
// TODO Auto-generated method stub
}
@Override
public void mouseReleased(MouseEvent e) {
// TODO Auto-generated method stub
}
}
}
And here is the GraphicsActivity:
import java.awt.Color;
import java.awt.Graphics;
import java.awt.event.MouseEvent;
public class GraphicsActivity {
public void drawRectRipple(Graphics g, MouseEvent e) {
g.setColor(Color.WHITE);
for (int i = 0; i <= 10; i++) {
for (int j = 0; j <= 250; j += 10) {
g.drawRect(e.getX() + j / 2, e.getY() - j / 2, j - j / 2, j +
j / 2);
try {
Thread.sleep(250);
} catch (InterruptedException e1) {
}
}
}
}
}
Any help would be greatly appreciated.
Thanks,
John