I created a new tile pattern and explained how

draw_tile_grid works.

Checkpoint 3:
I probably would use docstrings. I like to break up my work into small
bits. Having docstrings to quickly remind myself of what I've written
should do would be helpful. Additionally, if I'm working with or showing
my work to someone else, it'd be helpful for them to know what the
things I'm writing should do.

tile.py

@@ -10,14 +10,31 @@ def draw_tile_outline(size):
     square(size)
 
 def draw_squiggle(size):
-    forward(size/4)
-    pencolor("black")
     left(90)
-    quarter_arc_right(size/4)
+    quarter_arc_right(size/2)
-    quarter_arc_left(size/4)
+    quarter_arc_left(size/2)
+    left(90)
+    forward(size/2)
     quarter_arc_left(size/4)
     quarter_arc_right(size/4)
     left(90)
+    forward(size/2)
+    left(90)
+    forward(size/2)
+    left(90)
+    quarter_arc_right(size/4)
+    quarter_arc_left(size/4)
+    forward(size/2)
+    left(90)
+    forward(3*size/4)
+    #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)

tile_grid.py

@@ -10,7 +10,10 @@ 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 draws the grid by drawing the bottom-most row.
+    The width is the number of tiles within a row.
+    It creates a full row before creating the row above.
+    The height is the number of rows.
     """
     for y in range(height):
         for x in range(width):