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

  public Liigu3(){
    addKeyListener(this);
    new Thread(this).start(); 
  }
  
  
  
 
  public void keyPressed(KeyEvent e){
    int kood=e.getKeyCode();
    if(kood==KeyEvent.VK_UP) samm = samm + 0.01;
    if(kood==KeyEvent.VK_DOWN)samm = samm - 0.01;
  }
  



  public void joonista(){
   Graphics g=this.getGraphics();
   if(g!=null){
    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 void keyReleased(KeyEvent e){}
  public void keyTyped(KeyEvent e){}

  



  public static void main(String argumendid[]){
    Frame f=new Frame();
    f.add(new Liigu3());
    f.setSize(200, 200);
    f.setVisible(true);
  }
}