public Laststand() 
    {
        frame = new JFrame();
        Object[] options = { "Recruit", "Last Stand", "Veteran", "Martin Mode", "I quit" };
        difficulty = JOptionPane.showOptionDialog(null, "Choose your difficulty: ", "Last Stand", 1, 3, null, options, options[0]);
        
        if (difficulty == 4) 
        {
            System.exit(1);
        }
        init(this.difficulty);
    }