How Would i toggle the LookAt Off, so object faces origin

Hi Community, Im Learning Boolean's. And Im trying to get the LookAt to toggle Off, Ive Got first bit right I think, but not sure to put at the bottom. thanks in Advance

 #pragma strict
 
 var toggle : boolean;
 var target : Transform;
 
 function Start () {
 
 }
 
 function Update () {
     if (Input.GetButtonDown("Fire1"))
         toggle = !toggle;
         
     if (toggle){
         print("Toggled ON");
         transform.LookAt(target);
     }
     else
     if (Input.GetButtonUp("Fire1")){
     
         if (!toggle){
         print("Toggled OFF");
         
         }
     }
 }