How do I make one object appear after my Player collides with another object?

I am creating a simple platforming game, and I want to create a "Fake Door" type system, where when the Player hits the 'Fake Door' then that door disappears and the actual door to the next level appears somewhere else. I have the destroy the fake door part down, I just want to know how to make the real door appear.

Here is the code I have: (C#)

 void OnCollisionEnter2D(Collision2D Colider) {

     if (Colider.gameObject.tag == "Player1") {

         Destroy (gameObject);


     }    

 }

EDIT: I have found a way to do it. No need for help. Thanks :)