Missle Script

//Missle Script
var heightLimit             =10.0;
var explosion               :Transform;
var sceneManager            :GameObject;
var missileExplodeSound     :AudioClip;
var missileSpeed                =5.0;
var targetTag               :String;        //This is so you can change what tag is the target in the inspector instead of the script
var missileTargets          :Transform[];


function Update () //Game Loop runs every frame
{
    var tar = GameObject.FindWithTag(targetTag);
    if(tar)
    {
        var randomTarget = missileTargets[Random.Range(0, missileTargets.Length -1)];
        transform.LookAt(randomTarget);
        transform.Translate(Vector3.forward*missileSpeed*Time.deltaTime);

    }

    if(transform.position.y >= heightLimit) //check if the object is off screen
    {
        Destroy(gameObject);    //Remove the object from the scene
    }
}

function OnTriggerEnter (other : Collider) //Check for collisions with gameobjects tagged "Astroid"
{
    //Check for the asteroid
    if(other.gameObject.tag == "Astroid")
    {
        //Reset the position of the enemy
        other.transform.position.y = 8;
        other.transform.position.x = Random.Range(-7.0,7.0);

        //Create the explosion on impact
        if(explosion)
        {
            Instantiate(explosion, transform.position, transform.rotation); // Create prefab on collision
            audio.PlayClipAtPoint(missileExplodeSound, transform.position);
        }

        //Tell scene manager that we destroyed an enemy and add a point to the score
        sceneManager.transform.GetComponent("ScriptSceneManager").AddScore();

        //Get rid of the bullet
        Destroy(gameObject);                                        //Remove the object from the scene
    }
}