How to create object using onCollisionEnter trigger function ?

I am trying to create a game object called 'enemy' using the trigger function. How can I create a object I just know how to destroy a specific object ? In the code bellow I can destroy a object but I simultaneously want to create objects at a specific place. thank you in advance.

 function OnTriggerEnter (other : Collider) { 
 if(other.tag == "Player"){ 
  Destroy(gameObject.Find("door"));
  Destroy(gameObject.Find("box"));
 }
 }