Unity script to control BGM

BgmControl.cs

using UnityEngine;
using System.Collections;

public class BgmControl : MonoBehaviour {

  public AudioSource myAudioSource;
	// Use this for initialization
	void Start () {
    myAudioSource = GetComponent<AudioSource>();
	}
	
	// Update is called once per frame
	void Update () {
    if(CountDownTimer.gameTimerInt == 0) {
      myAudioSource.Stop();
    }
	}

}