Audio play/stop c#

I had a open light script but i wish use him to open and stop music.

1. using UnityEngine; using System.Collections;

public class LightSwitch2 : MonoBehaviour {

 public AudioClip sound;
 public bool onSwitch;
 public bool lightStatus;
 public GameObject theLight;

 void OnTriggerEnter(Collider other)
 {
     onSwitch = true;
 }

 void OnTriggerExit(Collider other)
 {
     onSwitch = false;
 }

 void Update()
 {
     if(theLight.active == true)
     {
         lightStatus = true;
     }
     else
     {
         lightStatus = false;
     }

     if (onSwitch)
     {
         if (lightStatus)
         {
             if (Input.GetKeyDown(KeyCode.E))
             {
                 GetComponent<AudioSource>().PlayOneShot (sound);
                 theLight.active = false;
             }
         }
         else
         {
             if (Input.GetKeyDown(KeyCode.E))
             {
                 GetComponent<AudioSource>().PlayOneShot (sound);
                 theLight.active = true;
             }
         }
     }
 }

 void OnGUI()
 {
     if (onSwitch)
     {
         if (lightStatus)
         {
             GUI.Box(new Rect(0, 0, 200, 20), "Press E to close the light");

         }
         else
         {
             GUI.Box(new Rect(0, 0, 200, 20), "Press E to open the light");
         }
     }
 }

}

How do I change it,so I can start and stop the music?