private var previousXValue : float = 0;
private var previousZValue : float = 0;
private var moving : boolean = false;
private var isIdle : boolean = true;

var walkAnimation : AnimationClip;
var idleAnimation : AnimationClip;
var idleBreak1Animation : AnimationClip;
var idleBreak2Animation : AnimationClip;

walkAnimation.wrapMode=WrapMode.Loop;
idleAnimation.wrapMode=WrapMode.Loop;
idleBreak1Animation.wrapMode=WrapMode.Once;
idleBreak2Animation.wrapMode=WrapMode.Once;

private var breakIdleAfterSeconds : int;

private var randomAnimation : int;
private var idleTime : float = 0.0;

function Awake () {
  // At waking up we pick a random time to start our first idle animation
  pickRandomIdleTime();
}

function Update(){
  //if we are idle just increment the idle time , else reset it
  idleTime=(isIdle) ? (idleTime+Time.deltaTime) :  0.0;

  if (idleTime >= breakIdleAfterSeconds){
    // pick a random idle break animation
    var idleBreakAnimations = [idleBreak1Animation, idleBreak2Animation];
    randomAnimation= Mathf.RoundToInt(Random.Range(0, idleBreakAnimations.length));

    animation.CrossFadeQueued(idleBreakAnimations[randomAnimation].name, 0.3, QueueMode.PlayNow);
    animation.CrossFadeQueued(idleAnimation.name, 0.3, QueueMode.CompleteOthers);

    // get a new random idle break time to keep things dynamic :)
    idleTime=0.0;
    pickRandomIdleTime();
  }

  // Check if we are actually roaming around , if so trigger the walking animation else, idle
  if (round(transform.position.x)!=previousXValue || round(transform.position.z)!=previousZValue){
    previousXValue=round(transform.position.x);
    previousZValue=round(transform.position.z);
    if (!moving){ SetMoving(true); }
  }else{
    if (moving){ SetMoving(false); }
  }
}

function SetMoving(val){
  if (val){
    moving=true;
    isIdle=false;
    Debug.Log ( "we are moving and should play "+ walkAnimation.name );
    transform.animation.CrossFade(walkAnimation.name);
  }else{
    moving=false;
    isIdle=true;
    Debug.Log ( "we stopped moving" );
    transform.animation.CrossFade(idleAnimation.name);
  }
}

//Something that we can fuzzely compare, in stead of 1.1231453252 we compare to 1.123
function round(val){
  return float.Parse(val.ToString("f3"));
}

function pickRandomIdleTime(){
  breakIdleAfterSeconds=Random.Range(15, 45);
  Debug.Log ( "I will break idle after " + breakIdleAfterSeconds + " seconds !");
}