public class styx extends Applet implements Runnable
{
    protected Thread daemon;
    
    public synchronized void start() //Overwrites Applet.start()
    {
        if (daemon == null)
        {
            daemon = new Thread(this);
            daemon.start();
        }
    }
    public synchronized void stop() //Overwrites Applet.stop()
    {
        daemon.stop();
        daemon = null;			//Delete Thread
    }
    public void run()                //Overwrites Runnable.run()          
    {
        while(daemon != null)
        {
            try {Thread.sleep(30);}  //Delay of 30 ms.
            catch (InterruptedException e){ }
            draw_styx(getGraphics());
        }
    }
 ...