public TheWorld() throws HeadlessException {
    super("This is the world, and God syas ...");
    p = new Panel();
    p.setBackground(Color.black);

    add(p);
    btnLand = new LetThereBeLandCommand("Let there be land", p);
    btnLight = new LetThereBeLightCommand("Let there be light", p);
    p.add(btnLand);
    p.add(btnLight);
    btnLight.addActionListener(this);
    btnLand.addActionListener(this);
    setBounds(100,100,400,200);
    setVisible(true);
  }