import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

//   Muuda joonistatavate ringide arvu kerimisribaga
public class Ringid2 extends Applet implements AdjustmentListener{
  Scrollbar sb=new Scrollbar(Scrollbar.VERTICAL, 3, 1, 0, 10);
  public Ringid2(){
    setLayout(new BorderLayout());
    add(sb, BorderLayout.WEST);
    sb.addAdjustmentListener(this);
  }
  public void paint(Graphics g){
    int keskx=getWidth()/2;
    int kesky=getHeight()/2;
    int r=Math.min(keskx, kesky)*3/4;
    for(int i=0; i<sb.getValue(); i++){
      g.drawOval(keskx-r, kesky-r, 2*r, 2*r);
      r=r*2/3;
    }  
  }
  public void adjustmentValueChanged(AdjustmentEvent e){
    repaint();
  }
  public static void main(String[] argumendid){
    Frame f=new Frame();
    f.add(new Ringid2());
    f.setSize(200, 200);
    f.setVisible(true);
  }
}