cause the object appears in front of the player when colliding with another object

This is my .js

public var sensor : GameObject; public var enemy : GameObject;

function Start () { gameObject.SetActive (false);

}

function Update () {

} function OnCollisionEnter(collision : Collision) {

     {GameObject("enemy");
     {gameObject.SetActive (true);
     
     }
 }
 // Destroy the projectile
 Destroy (gameObject);
 }