// print("is play")

    var player = AVAudioPlayer()

    let url:NSURL = NSBundle.mainBundle().URLForResource("intro", withExtension: "mp3")!

    do { player = try AVAudioPlayer(contentsOfURL: url, fileTypeHint: nil) }
    catch let error as NSError { print(error.description) }

    player.numberOfLoops = 1
    player.prepareToPlay()
    player.play()

}