Need help with this code!

using UnityEngine; using System.Collections;

public class PlayFilm2 : MonoBehaviour {

 // Use this for initialization
 void Start () 
 {
     // This first line is to play the movie!
     ((MovieTexture)GetComponent<Renderer>().material.mainTexture).Play();
 }



 
 //This line is to go to the next scene once the movie has finished playing!
 function Start ()
 {  
     renderer.material.mainTexture.Play ();    
     while (renderer.material.mainTexture.isPlaying)
         yield WaitForSecond  = (50);
     Application.LoadLevel("first scene of (the fallen ones)");
 }







 
 // Update is called once per frame
 void Update () {
 

 
 }

}

the code to play the movie is fine, but the function start code has a parser error i tried everything? im pretty new to scripting and so i cant figure it out? this part to be exact, yield WaitForSecond = (50);