import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
public class LiikuvRing extends Applet implements ActionListener{
  final int keskx=100;
  final int kesky=200;
  final int r=10;
  TextField tf1=new TextField(10);
  public LiikuvRing(){
    add(tf1);
    tf1.addActionListener(this);
  }
  public void actionPerformed(ActionEvent syndmus){
    Graphics g=getGraphics();
    double nurk=
      Math.toRadians(Double.parseDouble(tf1.getText()));    
    for(double k=0; k<240; k=k+2){
      int x=(int)(k*Math.cos(nurk));
      int y=(int)(k*Math.sin(nurk));
      g.setColor(Color.black);      
      g.drawOval(keskx+x-r, kesky-y-r, 2*r, 2*r);
      try{Thread.sleep(50);}catch(Exception e){}
      g.setColor(Color.white);   
      g.drawOval(keskx+x-r, kesky-y-r, 2*r, 2*r); 
    }
  }
 public static void main(String[] argumendid){
    Frame f=new Frame();
    f.add(new LiikuvRing());
    f.setSize(300, 300);
    f.setVisible(true);
  }

}