import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.math.*;
import java.lang.*;

public class ForWhile extends Frame {


public void paint(Graphics g) {
    Graphics2D graph = (Graphics2D)g;
      graph.setStroke(new BasicStroke(3.0f));
      graph.setColor(Color.black);
     double a = 100;
     double b =200;
      for(int i = 0 ; i<=10 ; i++)

             {
          double c = Math.random()*800;

          double d = Math.random()*800;

          Line2D line = new Line2D.Double(a,b,c,d);
          graph.draw(line);
          a = c;
          b = d;
             }
      }




    public static void main(String[] args) {
          Frame frame = new ForWhile();

          frame.addWindowListener(
                  new WindowAdapter(){
                      public void windowClosing(WindowEvent we){
                      System.exit(0);
                     }
                    }
                  );
          frame.setSize(1000, 1000);
          frame.setVisible(true);
    }



}