Combined Code
	frame 1 {
		if (!this.sounds_inited) {
			var bgm1 = new Sound();
			bgm1.attachSound('bgm1');
			var bgm2 = new Sound();
			bgm2.attachSound('bgm2');
			bgm1.onSoundComplete = function () {
				bgm2.start(0, 99999999);
			};
			bgm1.start();
			this.sounds_inited = true;
		}
	}
	frame 16 {
		gotoAndPlay(1);
	}