import java.awt.*;

public class Motion {
    public static void main(String[] args) {
	DrawingPanel p = new DrawingPanel(500, 200);
	Graphics g = p.getGraphics();
	for (int i = 0; i < 100; i++) {
	    // Color the whole DrawingPanel white
	    g.setColor(Color.WHITE);
	    g.fillRect(0, 0, 500, 200);
	    
	    // Make the red circle
	    // It moves to the right by 5 pixels every time through the loop
	    // It moves up and down in a sine wave
	    g.setColor(Color.RED);
	    g.drawOval(i * 5, (int)(Math.sin(i / (100 / (Math.PI * 4))) * 95) + 95, 10, 10);

	    // Pause the panel so that we can see each frame
	    p.sleep(50);
	}
    }
}