public static void main(String[] args) throws java.net.MalformedURLException
    {
        frame = new JFrame();
        frame.setSize(600, 600);
        frame.setTitle("Main Menu");
        frame.getContentPane().setLayout(null);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
       
        startMenu menu = new startMenu();
        //This line of code below cannot be found
        static Sound sounds = new Sound("Human Music.wav");
       
        menu.pickHumans();
        menu.pickRobots();
        menu.pickAliens();
       
        frame.remove(menu);
       
        frame.setVisible(true);
       
        sounds.playSound();
       

    }