Make spotlight flicker when seeing enemy?

 //Enemy script
 function OnBecameVisible () {
     Spotlight.Flicker();
 }

 //Spotlight script
 static var spotlight : Light;
 function Start () {
     spotlight = GetComponent(Light);
 }
 static function Flicker () {
     for (var i = 0; i<5; i++) {
         spotlight.enabled=!spotlight.enabled;
         yield WaitForSeconds(.05);
     }
     spotlight.enabled = true;
 }