zombie ai script(animation help)

i found a script off of the unity answers and found this

var target : Transform; //the enemy's target

var moveSpeed = 3; //move speed var rotationSpeed = 3; //speed of turning var attackThreshold = 1.5; // distance within which to attack var chaseThreshold = 10; // distance within which to start chasing var giveUpThreshold = 20; // distance beyond which AI gives up var attackRepeatTime = 1; // delay between attacks when within range private var chasing = false; private var attackTime = Time.time; var myTransform : Transform; //current transform data of this enemy function Awake() { myTransform = transform; //cache transform data for easy access/preformance } function Start() { target = GameObject.FindWithTag("Player").transform; //target the player } function Update () { // check distance to target every frame: var distance = (target.position - myTransform.position).magnitude; if (chasing) { //rotate to look at the player myTransform.rotation = Quaternion.Slerp(myTransform.rotation, Quaternion.LookRotation(target.position - myTransform.position), rotationSpeed*Time.deltaTime); //move towards the player myTransform.position += myTransform.forward moveSpeed Time.deltaTime; // give up, if too far away from target: if (distance > giveUpThreshold) { chasing = false; } // attack, if close enough, and if time is OK: if (distance < attackThreshold && Time.time > attackRepeatTime) { target.SendMessage("ApplyDamage",10); // Attack! (call whatever attack function you like here) } if (distance < attackThreshold) { moveSpeed=0; //stop when close enough } attackTime = Time.time+ attackRepeatTime; } else { // not currently chasing. // start chasing if target comes close enough if (distance < chaseThreshold) { chasing = true; } } } function OnTriggerEnter (other: Collider) { if (other.gameObject.CompareTag("Bullet")){ chaseThreshold=100000000; } } but i want to make it where when its not walking it makes it walking animation and when the zombie isn't moving it does its idle animation can someone help me out and program it where the zombie will animate idle AKA "lookAtDistance animation is called MaleArmAction walking AKA "attacking, or movespeed" animation is called Default Take