import javax.swing.*;
import java.awt.*;   

public class Six
{
   public static void main(String[] args)
   {
      SimpleFrame a = new SimpleFrame();
      a.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      a.setVisible(true);
   }
}   
    
class SimpleFrame extends JFrame
{
   public SimpleFrame()
   {
      this.setSize(600, 400);
   }
    
   int n;
   
   public void paint(Graphics g) {
     System.out.println(n);
     this.n += 1;
   }
}