AIFollow

var target : Transform;
var moveSpeed = 20;
var rotationSpeed = 5;
var myTransform : Transform;

function Awake() {
    myTransform = transform;
}

function Start() {

    target = GameObject.FindWithTag("Player").transform;
}

function Update () {

    myTransform.rotation = Quaternion.Slerp(myTransform.rotation,
    Quaternion.LookRotation(target.position - myTransform.position), rotationSpeed*Time.deltaTime);
    myTransform.position += myTransform.forward * moveSpeed * Time.deltaTime;
}