Need help with my enemy spawn script.

Ok so I made the changes to the script as follows:

 #pragma strict
 
 var emily : GameObject;
 var emilyspottedSound : AudioClip;
 var target : Transform;
 var safeDistance = 10; //How close the player can get
 
 function Start () {
 renderer.enabled = false;
 collider.enabled = false;
 
 }
 
 
 
    function Update(){
      
     //check how close the player is
     var distanceToPlayer = Vector3.Distance(this.transform.position, target.transform.position);
      
     // this checks to see if the player is too close then runs the spawn function
     if(distanceToPlayer <= safeDistance){
     spawn();
     }
     
      if (renderer.enabled == true){
             destroy();
         }
     
      
     
 
  }
  
     
     //this is your spawn function
     function spawn (){
     //look at the target
     renderer.enabled = true;
     collider.enabled = true; 
     transform.LookAt(target);
     audio.Play();
     }
     
     function destroy(){
     yield WaitForSeconds (0.5);
     Destroy(gameObject);
         
     }

It unfortunately still doesn't work. She just stands there lol.