import java.awt.*;
public class Liigu3 extends Frame implements Runnable{
  double nurk=0;
  double raadius=50;
  double samm=0.01;
  int ooteaeg=10; //ms
  boolean veel=true;

  public Liigu3(){
    super("Ringike");
    setSize(300, 300);
    setVisible(true);
    new Thread(this).start();
  }

  public void joonista(){
    Graphics g=this.getGraphics();
    g.setColor(Color.white);
    g.fillRect(0, 0, getSize().width, getSize().height);
    int keskx=getSize().width/2;
    int kesky=getSize().height/2;
    g.setColor(Color.black);
    g.drawOval(
      keskx+(int)(raadius*Math.cos(nurk))-5,
      kesky+(int)(raadius*Math.sin(nurk))-5,
      10, 10
    );
    nurk=nurk+samm;
    if(nurk>2*Math.PI)nurk-=2*Math.PI;
  }
  public void run(){
    while(veel){
      joonista();
      try{
        Thread.sleep(ooteaeg);
      } catch(Exception e){e.printStackTrace();}
    }
  }
  public static void main(String argumendid[]){
    new Liigu3();
  }
}