how to play movie only when it been trigger

hello, i want my movie to play only when it been triggered by the player. i use box as my trigger object. when the player hit the box, canvas will appear and on the canvas i add raw image as my movie texture. can someone check the coding for me. thank you

using UnityEngine; using System.Collections; using UnityEngine.UI;

[RequireComponent(typeof(AudioSource))]

public class simpang4Movie : MonoBehaviour {

 public MovieTexture movie;
 private AudioSource audio;


 // Use this for initialization
 void Start () {

     GetComponent<RawImage> ().texture = movie as MovieTexture;
     audio = GetComponent<AudioSource> ();
     audio.clip = movie.audioClip;
     movie.Play ();
     audio.Play ();

 }

 //void onTriggerEnter(Collider col) {
 //if(col.CompareTag("Player"))

         
 //    movie.Play ();
 //    audio.Play ();

 //}
 //}

 // Update is called once per frame
 

}