class MyFrame extends JFrame {
	public MyFrame() {
		MyPanel np = new MyPanel();
		Container cont = getContentPane();
		cont.add(np);
		setBounds(10, 10, 1000, 1000);
		setVisible(true);
	}
}

class MyPanel extends JPanel {

	int[][] country;


	public MyPanel() {

		country = new int[10][2];

		for (int city = 0; city < 10; city += 1) {
			country[city][0] = (int)Math.round(Math.random() * 900.0);
			country[city][1] = (int)Math.round(Math.random() * 900.0);
		}

	}

	public void paintComponent(Graphics gr) {
		gr.clearRect(0, 0, 1000, 1000);
		for (int city = 0; city < 10; city += 1) {
			gr.fillRect(country[city][0], country[city][1], 5, 5);
		}
	}
}