Types n stuff

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Raz
 #1
I have a type "Tiles" and two sub types that extend it called "background" and "foreground"
Type Tiles
	Field X,Y
	Method Draw()
	
	End Method
End Type
Global Tile_List:TList = CreateList()

the sub types have their own draw methods
' Back
Type B_Type Extends Tiles
	Field F
	
	Method Draw()
		If x > Screen_X - Screen_Border And x < Screen_X_Max + Screen_Border
			If y > Screen_Y - Screen_Border And y < Screen_Y_Max + Screen_Border	
				DrawImage gfxTileset,x,y,f
			EndIf
		EndIf
	End Method
	
End Type

and when I create one of either sub types they get added to the main list 
Tile_List.AddLast( NewB )

I want to be able to easily draw all of the tiles with one command... so I was thinking
	For Local Tile:Tiles = EachIn Tile_List
		Tile.Draw()
	Next

However, this just runs the Draw method from the Tiles type. If I remove said method, the command "Tile.Draw()" doesnt work. But I want each entry in the list to run its own Draw method.

What am i doing wrong? ta!