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

class line {
   private int x1=0, y1=0, x2=0, y2=0;
   
   public void set_val(int xa, int ya, int xb, int yb){
    x1=xa; y1=ya; x2=xb; y2=yb;
   }// method set_vaL

   public void draw(Graphics page) {
   page.drawLine(x1,y1,x2,y2);
   }// method draw
}// class line

public class hw1 extends Applet{

  private line line1,line2;
  private Graphics page;

  public void init(){
   line1 = new line();
   line2 = new line();
   setSize(600,600);
   setVisible(true);
   page = getGraphics();
  }// method init

  public void paint(Graphics page){
   draw(page);
  }// method start

  public void draw (Graphics page){
    page.setColor(Color.blue);
    page.fillRect(0,0,600,600);
    page.setColor(Color.yellow);
    line1.set_val(50,50,400,400);
    line1.draw(page);
    line2.set_val(50,400,400,50);
    line2.draw(page);
  }//method draw

}// class hw1