How to create homing missile that follows path using Unity and iTween

//Path Attach var path : Transform[]; private var pathPosition : float=0 ; public var character : Transform; private var value : float; public var rocketSpeed : float; private var closest : GameObject; private var coordinateOnPath : Vector3; var pathPercent : float;

function Update(){ FindClosestEnemy(); DetectKeys(); }

// Find the name of the closest enemy function FindClosestEnemy () : GameObject {

// Find all game objects with tag Enemy var gos : GameObject[]; gos = GameObject.FindGameObjectsWithTag("Enemy"); var closest : GameObject; var distance = Mathf.Infinity; var position = transform.position; // Iterate through them and find the closest one for (var go : GameObject in gos) { var diff = (go.transform.position - position); var curDistance = diff.sqrMagnitude; if (curDistance < distance) { closest = go; distance = curDistance; } } return closest; }

function DetectKeys(){ //fire if (Input.GetKeyDown("left ctrl") && Time.time > reloadTime + lastShot && ammoCount > 0) { Debug.Log ("FIRE"); // create a new projectile, use the same position and rotation as the Launcher. var instantiatedProjectile : GameObject = Instantiate (projectile,transform.position, transform.rotation);

   //Find Character Location on Path
   pathPercent = pathPosition%1;
   coordinateOnPath = (iTween.PointOnPath(path,pathPercent));

   //Place on Path
   iTween.PutOnPath(projectile,path, coordinateOnPath);

   //Orient object to path 
   transform.LookAt(iTween.PointOnPath(path,value+.05));

   //Make it a RigidBody
   instantiatedProjectile.AddComponent ("Rigidbody");
   instantiatedProjectile.AddComponent ("CapsuleCollider");

   // Move Rocket to Closest Enemy
   iTween.MoveTo(closest, transform.position, rocketSpeed);

   //Original Movement Code
   //instantiatedProjectile.velocity = transform.TransformDirection(Vector3 (0, 0, initialSpeed));

   //Ignore Collisions between object and Projectile
   Physics.IgnoreCollision(instantiatedProjectile.collider, transform.root.collider);

   //Cooldown and Reduce Ammo Count
   lastShot = Time.time;
   ammoCount--;

 }

}