Destroy script help?

Here's the script :

 #pragma strict
 
 var hitPosition : Vector3;
 var test : Transform;
 var location : boolean = false;
 var toDestroy : GameObject;
 var destroyNow : boolean = false;
 
 function Update () {
     toDestroy = GameObject.FindGameObjectWithTag ("destroy");
 
     if (location == false) {
     
     Debug.Log ("No Location");
         gameObject.SendMessage ("PlaceLocation");
     
     }
     
         if (location == true) {
             
             Debug.Log ("Location");
         
         }
         
         if (Input.GetMouseButtonUp(0)) {
         
             destroyNow = true;
         
         }
             if (destroyNow == true) {
             
                 gameObject.SendMessage ("Destroy");
             
             }
 
 }
 function PlaceLocation () {
 
     if (Input.GetMouseButtonDown(0)) {
         
         location = true;
     
         var hit: RaycastHit;
         var ray : Ray = Camera.main.ScreenPointToRay (Input.mousePosition);
         
         if (Physics.Raycast (ray, hit)) {
         
             hitPosition = hit.point;
             Instantiate (test, hitPosition, Quaternion.identity);
 
             
             }
         
         }
     
     }
     
 function Destroy () {
 
     Destroy (toDestroy);
     location = false;
     
     
     
 
 }

So what's meant to happen when you hold down left click it creates a cube and when you let go it deletes. This works once but the next time it spawns it and deletes it the next frame. What did I do wrong?

Thanks in advance