I deleted you explanation and wrote what i belive the function does.

When I write my own program, I will use a docstrings because if I come back to the program later on, it will help me remeber what the specific code if for.

tile.py

@@ -6,7 +6,7 @@ def draw_tile(size):
     draw_squiggle(size)
 
 def draw_tile_outline(size):
-    pencolor("#dddddd")
+    pencolor("#2f5da3")
     square(size)
 
 def draw_squiggle(size):