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):

tile_grid.py

@@ -10,7 +10,7 @@ from tile import fly
 def draw_tile_grid(width, height, tile_size, tile_function):
     """Draws a (width x height) grid, with tile_function drawn on each tile.
 
-    (Your explanation here.)
+    The function uses loops to draw the rows and coloums on each grid based on the width,height, and size.
     """
     for y in range(height):
         for x in range(width):