GraphicsTile

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridLayout;

@SuppressWarnings("serial")
public class GraphicsTile extends JPanel {
	public static final Dimension SIZE = new Dimension(140, 140);
	public static final GridLayout MGR = new GridLayout(2, 2);

	public GraphicsTile() {
		super();
		setLayout(MGR);

		add(new CirclePanel());
		add(new CirclePanel());
		add(new CirclePanel());
		add(new CirclePanel());

	}

	@Override
    public Dimension getPreferredSize() {
    	return SIZE;
    }

	@Override
	protected void paintComponent(Graphics g) {
		super.paintComponent(g);
		g.setColor(Color.GREEN);
		g.fillRect(0, 0, 140, 140);
	}
}