UNITYSCRIPT - Class's and Instances - Functions/Methods - Correct Usage

Say I have a Class:

 //.js Script file named UFO 
 class UFOs {
    public static var ufoList:List.<UFOs>;
    var ufoGameObject:GameObject;
    var xlocation:float;
    var ylocation:float;
 
    public function UFOs( go:GameObject, xl:float, yl:float ) {
      ufoGameObject = go;
      xlocation = xl;
      ylocation = yl;
 
    }

    public function RandomMoves() {
         random movement code here.;
    }
 }

============================

//.js Script file named UFOSpawner

 var ufo:GameObject;  // This is assigned the GameObject via the inspector
 
 function start() {
    if ( UFO.ufoList == null ) {
      UFO.ufoList = new List.<UFOs>();
    }
 }
 
 function update() {
    if ( key(H) is tapped ) {
       var u:UFOs = new UFOs( Instantiate(ufo), transform.position.x, transform.position.y);
       UFOs.ufoList.Add(u);
    }
 
    if ( UFO.ufoList != null ) {
      for ( u in UFOs.ufoList ) {
        u.RandomMoves();
      }
    }

=============================================================================

Am I getting this? The problem I have is when I iterate the list and try to get u.RandomMoves for each u, whether there are 5 or 100 instances only 1 u moves randomly. What am I missing?

regards,