diff --git a/tile.py b/tile.py
index 697cf8e..89f2c63 100644
--- a/tile.py
+++ b/tile.py
@@ -1,5 +1,6 @@
 from turtle import *
 
+# Nelson Mason - LAI 676LEC A - Assignment 1.4 - Checkpoint 3 - Draw with ranges
 def draw_tile(size):
     "Draws one tile, which can be repeated to form a pattern."
     draw_tile_outline(size)
@@ -9,19 +10,26 @@ def draw_tile_outline(size):
     pencolor("#dddddd")
     square(size)
 
-def draw_squiggle(size):
+def draw_squiggle(size): # recoded to draw a circle within each square
+    penup()
     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/2)
+    pendown() # new starting point for drawing inside the tile
+    #forward(size/4) # original starting point for drawing inside the tile 
+    pencolor("yellow") # change of color
+    #left(90) part of original starting point positioning - moved up in this code block
+    quarter_arc_right(size/4) # 1st arc
+    #quarter_arc_left(size/4) not needed for right-turn drawing of circle
+    #quarter_arc_left(size/4) not needed for right-turn drawing of circle
+    quarter_arc_right(size/4) # 2nd arc
+    quarter_arc_right(size/4) # 3rd arc - added to keep drawing the circle
+    quarter_arc_right(size/4) # 4th arc - added to keep drawing the circle
+    left(90) # lines 28-32 moves the pen to the tile outline starting point, 
+    fly(size/4) 
     left(90)
+    fly(size/2)  
+    left(90) # lower left corner, pointing to the right
 
 def fly(distance):
     "Moves without drawing."
diff --git a/tile_grid.py b/tile_grid.py
index 72a0f43..13986a0 100644
--- a/tile_grid.py
+++ b/tile_grid.py
@@ -8,9 +8,13 @@ from turtle import *
 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.
+    """Draws a (width * height) grid, with tile_function drawn on each tile.
 
-    (Your explanation here.)
+    (nested loops - inner loop draws one complete row (width), inner loop closes, 
+    outer loop positions the pen's return to row starting point, 
+    then moves pen up along height to start a new row.)
+    -- (fly(tile_size) positions the pen in the next column (width) to the right
+    to draw the next tile in each row)
     """
     for y in range(height):
         for x in range(width):
@@ -37,6 +41,3 @@ def move_up_one_row(tile_size):
     right(90)
 
 
-
-
-