public void playBackgroundMusic()
    {
        x = Greenfoot.getRandomNumber(3);
        if(x == 1) {
            Greenfoot.playSound("Jingle Bells 3.wav");
        }
        if(x == 2) {
            Greenfoot.playSound("Oh Xmas.wav");
        }
        if(x == 3) {
            Greenfoot.playSound("We Wish You.wav");
        }
        if(x == 0) {
            Greenfoot.playSound("We Wish You.wav");
        }
    }