I'm having problems with my code

I created 4 empty objects around the board one on each corner. Each corner has a tag and name "yoWassup1"- up to "yoWassup4". I want a timer to count up until it gets to 5 and then picks a random number and spawns at the corresponding spawn point. The idea is for it to go in a loop and every 5 seconds the game gets harder and new ball is spawned in.

The error that comes up is that "The associated script can not be loaded. Please fix any compile errors." no errors show up on the console. It just doesn't go into play mode.

thanks a lot

my code is as follows:

 var thePrefab : GameObject;
 
 public var myTimer : float = 0.0;
 
 var spawning : boolean = false;
 
 var yoWassup1 : Transform;
 
 var yoWassup2 : Transform;
 
 var yoWassup3 : Transform;
 
 var yoWassup4 : Transform;
 
 
 function Update () {
 
  if(!spawning){
 
   myTimer += Time.deltaTime;
 
  }
 
  if(myTimer >= 5)
 {
 
  Spawn()
  }
  }
 function Spawn(){
 
 spawning = true;
 
 myTimer=0;
 
 var randNumber: int =(Random.Range(1,5));
 
 var location :Transform;
 
      if (randNumber == 1){
 
          location = yowassup1;
 
           Debug.Log ("PICKED 1");
 
          }
 
        else if (randNumber == 2){
 
           location = yowassup2;
 
           Debug.Log ("PICKED 2");
 
      }
 
       else if (randNumber == 3){
 
           location = yowassup3;
 
           Debug.Log ("PICKED 3");
 
      }
 
      else if (randNumber == 4){
 
 
          location = yowassup4;
 
           Debug.Log ("PICKED 4");
 
     }
 
 
 Instantiate(thePrefab, location.position, location.rotation);
 
  spawning = false;
 
     }