public static void playMusic(){
     media =  new Media("file:///" + System.getProperty("user.dir").replace('\', '/') + "/" + "ressource/audio/tetris_1.mp3");
    MediaPlayer player = new MediaPlayer(media);// I will declare media and player it as a static variable later
    player.setAutoPlay(true);
    player.play();
    player.setOnEndOfMedia(new Runnable() {
        public void run() {
        player.seek(Duration.ZERO);
       }
         });
    // Create Handlers for handling Errors (copy-pasted code)
    player.setOnError(new Runnable()
    {
        public void run()
        {
            System.out.println(player.getError());
        }
    });

    media.setOnError(new Runnable()
    {
        public void run()
        {
            System.out.println(media.getError());
        }
    });
    }