Created a line in the title by creating a function and moving the turtle foward and back. I took out the squiggle function.

Checkpoint 3: Yes I do think I will use docstrings as it will help me provide space to write explain the meaning of the code along with what it is doing. They can be very useful.

tile.py

@@ -3,25 +3,20 @@ from turtle import *
 def draw_tile(size):
     "Draws one tile, which can be repeated to form a pattern."
     draw_tile_outline(size)
-    draw_squiggle(size)
+    draw_stripe(size)
 
 def draw_tile_outline(size):
     pencolor("#dddddd")
     square(size)
 
-def draw_squiggle(size):
+def draw_stripe(size):
-    forward(size/4)
     pencolor("black")
-    left(90)
-    quarter_arc_right(size/4)
-    quarter_arc_left(size/4)
-    quarter_arc_left(size/4)
-    quarter_arc_right(size/4)
-    left(90)
     fly(size/4)
     left(90)
-    fly(size)
+    forward(size)
-    left(90)
+    backward(size)
+    right(90)
+    fly(-size/4)
 
 def fly(distance):
     "Moves without drawing."
@@ -34,11 +29,3 @@ def square(size):
     for side in range(4):
         forward(size)
         left(90)
-
-def quarter_arc_right(radius):
-    "Draws a quarter of an arc, turning to the right."
-    circle(-radius, 90)
-
-def quarter_arc_left(radius):
-    "Draws a quarter of an arc, turning to the left."
-    circle(radius, 90)

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.)
+    (You give it a grid width, height, size(length) and function that does the drawing. It draws tiles goes to the left moves up a row and repeats all the rows from the height and width. The turtle then ends at the starting point.)
     """
     for y in range(height):
         for x in range(width):