Trying to understand editor scripts

Im trying to get a label to pop up over every child in any gameobject with the 'drawlinetryout' script on it- so what am I doing wrong? the waypoints var is a transform[] in the drawlinetryout script. It keeps throwing me error messages.

  @CustomEditor (drawlinetryout)    
  class LabelHandle extends Editor {       
   function OnSceneGUI () {            
  
  
      
      Handles.color = Color.black; 
     
     
     //for (var child : Transform in transform) {  
 
  
  
 var script = new SerializedObject(target);
 
  var waypoints:Transform [] = script.FindProperty("waypoints");
 
 
 for ( i = 0; i < waypoints.Length; i++)
 
 
     
     //Handles.Label(target.transform.position + target.transform.up *.5, target.transform.name.ToString());             
     
 Handles.Label(waypoints[i].position + waypoints[i].up *.5, waypoints[i].name.ToString());             
     
 
      
      
      
      }   
       }