JFrame testFrame = new JFrame();
		JPanel testPanel = new JPanel();
		JPanel testPanel2 = new JPanel();

		testPanel2.setSize(100,100);
		
		testFrame.setSize(500,500);
		
		testPanel.setBackground(Color.black);
		testPanel2.setBackground(Color.white);
		testPanel.add(testPanel2);
		testFrame.add(testPanel);
		testFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		testFrame.setVisible(true);