Play animation with key once

Hey everyone.

I have a cube with the trigger is checked and ik drawed this JS into this GameObject.

 var DoorGameObject : Transform; // This is a reference to the door GameObject that has your animation
 
 private var HasTriggerBeenUsed : boolean = false; // This is to make sure that the button is not repeatedly pressed.
 
 private var setTrigger : boolean = false;
 
 function OnTriggerStay() {
 
    if (Input.GetKeyDown("e") && !HasTriggerBeenUsed) {
 
       DoorGameObject.animation.Play("HouseDoor1");
 
       setTrigger = true;
 
    }
 
 }

And i made sure the object is selected with the variable. Everything works fine. But there is only one problem. Everytime i'm in the trigger, and i press the "E" key. The animation plays. But what i want is, if i pressed the "E" key and the animation has played. The animation cant play for the second time. Only once. So i thought maybe i can destrot the cube after the "E" key. so can someone help me with this how to do that?

Sorry for my English. I'm a MaroccanDutchman ;)

Hope to hear soon about you :D