Enemy and spawn?

Unity Engine
1

Hi,

Can I have help? How do I insert an enemy and it’s spawn points into my game? The FPS tutorial package version lags my game

2

var spawnPt : Vector3;
var enemy : GameObject;
var enemyPrefab : GameObject;

function spawn()
{
enemy.Instantiate(enmeyPrefab, spawnPt, transform.rotation);
}