class Prob04Runner{
  Turtle turtle = null;
  Picture picture = null;
  int counter = 0;
  World world = new World(200,200);
  JButton button = new JButton("Click Me.");

  public Prob04Runner(){
    //Get a reference to the JFrame object that is used
    // to display the World.
    JFrame frame = world.getFrame();

    //Add the JButton object to the
    // SOUTH location in the JFrame object.
    frame.getContentPane().add(button,BorderLayout.SOUTH);

    frame.pack();