Instantiate Prefab

Hey Guys, Johnny Here :D I was wondering if anyone knew of a way to instantiate a prefab in this way: I want to instantiate a prefab every so often in the position as a game object in the scene. This is what I have so far:

 var spawnpoint:GameObject; // this Gameobject position will be the spawn position
 var enemy:GameObject; // I'll put the enemy here to be instantiated
 var timeamount :float; // how many seconds to count before an enemy is spawned
 
 
 InvokeRepeating("Start", 0, (timeamount));
 
 function Start(){
 
 var spawnenemy = Instantiate(enemy, spawnpoint, GameObject.Find("Player").transform.rotation);
 
 }

Could someone please help me? Thanks so much :D