Creating an object within an object

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Game Boy

I was wondering if anyone knew how to instantiate an object from a method within an object. The following is an example of what I'm trying to do:

Type map
  Field width:Int=50;
  Field height:Int=50;
  Field layers:TList=CreateList();
  ' *** CONSTRUCTOR
  Function Create:map()
    *** Works fine here
  End Function
	
	
  Method addLayer(id:Int,layerName:String)
    **** Following line tries to create new layer object
    Local layer:mapLayer = New mapLayer.Create(1,layerName,Self.width,Self.height);
    For Local rep = 1 To 20
      layer.map[Rnd(Self.width),Rnd(Self.height)] = 1;
    Next
    
    ListAddLast Self.layers,layer;

  End Method
	
  Method drawMap()
    **** draw map code
  End Method

End Type


Type mapLayer
  Field id:Int;
  Field name:String;
  Field map:Int[50,50];
	
  ' *** CONSTRUCTOR
  Function Create:mapLayer(layerID:Int,layerName:String,width:Int,height:Int)
    Local newLayer:mapLayer = New mapLayer
    'newLayer.map = New Int[width,height];
    newLayer.name = layerName
  End Function
End Type

As you can see from the code, the new object is added to the layers list, but when I try to access the created object, none of the properties such as the map array can be access.