var shootForce:int = 1000;
var prefabBall:Transform;
var target:Transform;
var minShootDistance:int;

function Update () {

pivotPoint = gameObject.transform.position;
pivotPoint = rotateArrow.pivotPoint;
spawnPoint = pivotPoint + Vector3(0, 5, 0);
shootDirection = target.position - spawnPoint;
shootDistance = Vector3.Distance(target.position, spawnPoint);

	if(Input.GetMouseButtonDown(0)) {
	if (shootDistance < minShootDistance ) {	
	var instantiatedBall = Instantiate(prefabBall, spawnPoint , Quaternion.identity);
	instantiatedBall.rigidbody.AddForce(shootDirection* shootForce);
		}
	}
}