tile with squared in the corners and a diamond in the middle

It took me quite some time to get the tile set to print as expected.
It kept drawing the tiles in random positions.  I had to determine where
I wanted to end the curser so it could appropriatly start the next tile.

square.py

@@ -1,7 +1,7 @@
 from turtle import *
 
 def square(side_length):
-    for i in range(4):
+    for side in range(4):
         forward(side_length)
         right(90)
    

tile.py

@@ -3,25 +3,58 @@ 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_design(size)
 
 def draw_tile_outline(size):
     pencolor("#dddddd")
     square(size)
 
-def draw_squiggle(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)
-    left(90)
+def draw_design(size):
+    
+    pencolor("blue")
+    
+    "draw a corner square 1/4 the size of the tile"
+    for i in range(4):
+        forward (size/4)
+        left (90)
+        forward (size/4)
+        left (90)
+        forward (size/4)
+        left (90)
+        forward (size/4)
+        left (90)
+        forward (size)
+        left (90)
+    
+    "move to the top of the diamond"
+    left (90)
+    forward (size*3.5/4)
+    penup()
+    right(90)
+    forward (size/2)
+    right(45)
+    pendown()
+    "draw red diamond"
+    pencolor("red")
+    forward (size/2)
+    right(90)
+    forward (size/2)
+    right(90)
+    forward (size/2)
+    right(90)
+    forward (size/2)
+    penup()
+    "reset pen"
+    left(45)
+    forward (size/2)
+    right (180)
+    forward(size+size/4+size/8)
+    right(90)
+    forward (size/2)
+    right (180)
+    pendown()
+
+
 
 def fly(distance):
     "Moves without drawing."