Update instatiate doesn't work?

I have 4 empty game objects from which to launch balls ( like Crash Bash Ballistix )but after the first ball is launched ( Start ) nothing happens. It works if i attach 4 scripts to these objects but that's lame and I want it all in one while attached to some other object like arena.

public Rigidbody Ball;

 private float Timer = 0;

 private Rigidbody newBall = null;

 public GameObject Launch1;
 public GameObject Launch2;
 public GameObject Launch3;
 public GameObject Launch4;

 void Start () {



     newBall = Instantiate(Ball, Launch1.transform.position, transform.rotation) as Rigidbody;
     newBall.AddForce (new Vector3 (-220, 0, -150));

 }

 void Update() 
 

{

     Timer += Time.deltaTime;

     if (Timer == 40) {
         newBall = Instantiate (Ball, Launch1.transform.position, transform.rotation) as Rigidbody;
         newBall.AddForce (new Vector3 (-22, 0, -15));
         Timer = 0;


     }

     else if (Timer == 30) {
         newBall = Instantiate (Ball, Launch2.transform.position, transform.rotation) as Rigidbody;
         newBall.AddForce (new Vector3 (-22, 0, -15));

     }

     else if (Timer == 20) {
         newBall = Instantiate (Ball, Launch3.transform.position, transform.rotation) as Rigidbody;
         newBall.AddForce (new Vector3 (-22, 0, -15));
     }

     else if (Timer == 10) {
         newBall = Instantiate (Ball, Launch4.transform.position, transform.rotation) as Rigidbody;
         newBall.AddForce (new Vector3 (-22, 0, -15));
         Debug.Log ("YOLO");
     }

}
}