//Set Frame size to two-inch by two-inch
    this.setSize(2*res,2*res);
    this.setVisible(true);
    this.setTitle("Copyright 1999, R.G.Baldwin");
       
    //Window listener to terminate program.
    this.addWindowListener(new WindowAdapter(){
      publicvoid windowClosing(WindowEvent e){
        System.exit(0);}});
  }//end constructor






Figure 4