Only setup canvas when it is first created.
Fixes #1514703
diff --git a/Lib/lib-tk/turtle.py b/Lib/lib-tk/turtle.py
index 0fe83a3..b5bad59 100644
--- a/Lib/lib-tk/turtle.py
+++ b/Lib/lib-tk/turtle.py
@@ -679,7 +679,7 @@
             _canvas = Tkinter.Canvas(_root, background="white")
             _canvas.pack(expand=1, fill="both")
 
-        setup(width=_width, height= _height, startx=_startx, starty=_starty)
+            setup(width=_width, height= _height, startx=_startx, starty=_starty)
 
         RawPen.__init__(self, _canvas)