// Illustrate clearing of the previous step in an animation by
    // re-painting with the background colour.
import java.awt.*;

public class AWTMovingArc {
    public static void main(String[] args){
        MovingArcFrame frame = new MovingArcFrame();
        frame.addWindowListener(new WindowCloser());
        frame.setVisible(true);
        // Hand over to the frame to run forever.
        frame.run();
    }
}