Enemy spawn issues

Currently I'm attempting to spawn enemies based off of the 3 that I currently have, pictured below (pink, blue, red). I want them to spawn new clones 1 at a time over a period of time. I've already attempted at accomplishing this, but it doesn't seem to want to actually create the new enemies. What do I do? I'll post what I have so far for reference and see if I'm calling something wrong or if I'm doing it completely wrong.

 #pragma strict
 
 var pinkProjectile : Transform;
 var blueProjectile : Transform;
 var redProjectile : Transform;
 
 //var pinkCopy : Transform;
 //var blueCopy : Transform;
 //var redCopy : Transform;
 
 var enemy : Transform;
 var shootCoolDown : float; //Wait 1.5 seconds before shooting again
 var shootTimer : float; //Records how much time between shots
 
 //var enemies : GameObject[];
 
 var pinkLives = 1;
 var blueLives = 2;
 var redLives = 3;
 
 var spawnEnemies = 0;
 var spawn = false;
 
 var timesHit = 0;
 //var enemyArray = new Array();
 //enemyArray.length = 3;
 
 function Start () {
     if(spawn == false) {
         InvokeRepeating("spawnEnemy", 3, 5);
         spawn = true;
     }
 }
 
 function Update () {
     shootLazer();
 }
 
 function OnTriggerEnter(collision:Collider) {
     if(gameObject.name == "Enemy_Pink") {
         if(collision.gameObject.tag == "Bullet") {
             pinkLives--;
             if(pinkLives == 0) {
                 Destroy(GameObject.Find("Enemy_Pink"));
             }
         }
     }
     if(gameObject.name == "Enemy_Blue") {
         if(collision.gameObject.tag == "Bullet") {
             blueLives--;
             if(blueLives == 0) {
                 Destroy(GameObject.Find("Enemy_Blue"));
             }
         }
     }
     if(gameObject.name == "Enemy_Red") {
         if(collision.gameObject.tag == "Bullet") {
             redLives--;
             if(redLives == 0) {
                 Destroy(GameObject.Find("Enemy_Red"));
             }
         }
     }
     Destroy(collision.gameObject);
 }
 
 function spawnEnemy() {
     var instantiatedEnemy : Transform;
     var newEnemyOriginX = enemy.transform.position.x;
     var newEnemyOriginY = enemy.transform.position.y;
     var newEnemyOriginZ = enemy.transform.position.z;
     instantiatedEnemy = Instantiate(enemy, Vector3(newEnemyOriginX, newEnemyOriginY, newEnemyOriginZ), transform.rotation);
     instantiatedEnemy.rigidbody.AddForce(instantiatedEnemy.transform.up * - 20);
     spawnEnemies++;
 }