Finished making the board now starting on the checker pieces

something im wondering about is how can I shorten my code

drawing.py

@@ -7,12 +7,6 @@
 from turtle import *
 
 
-def square(size):
-    "Draws a square of side length `size`"
-    for side in range(4):
-        forward(size)
-        right(90)
-
 def board(side_length):
     "Out line of the board"
     sides = [side_length, side_length, side_length, side_length]
@@ -20,13 +14,25 @@ def board(side_length):
         pensize(4)
         forward(sides)
         right(90)
-    
-board(400)
 
-def black_row(side_length):
+def blue_coin(size):
+    begin_fill()
+    fillcolor('blue')
+    circle(size)
+    end_fill()
+
+
+penup()
+goto(-300, 200)
+pendown()
+board(400)
+  
+"first row"
+def black_row(size):
+    "black tile first"
     repeat = [1, 2, 3, 4]
     for repeat in repeat:
-        forward(50)
+        forward(size)
         right(90)
 
 sizes = [50,50,50,50]
@@ -38,16 +44,140 @@ for size in sizes:
     penup()
     forward(size * 2)
     pendown()
-
-
 right(90)
 forward(50)
 right(90)
 forward(400)
 left(180)
-square(50)
 forward(50)
-black_row(50)
+
+"second row - white tile first"
+sizes = [50,50,50,50]
+for size in sizes:
+    begin_fill()
+    fillcolor('black')
+    black_row(size)
+    end_fill()
+    penup()
+    forward(size * 2)
+right(90)
+forward(50)
+right(90)
+forward(50)
+pendown()
+forward(400)
+left(180)
+
+"third row - black tile first"
+sizes = [50,50,50,50]
+for size in sizes:
+    begin_fill()
+    fillcolor('black')
+    black_row(size)
+    end_fill()
+    penup()
+    forward(size * 2)
+    pendown()
+right(90)
+forward(50)
+right(90)
+forward(400)
+left(180)
+forward(50)
+
+
+"fourth row - white tile first"
+sizes = [50,50,50,50]
+for size in sizes:
+    begin_fill()
+    fillcolor('black')
+    black_row(size)
+    end_fill()
+    penup()
+    forward(size * 2)
+right(90)
+forward(50)
+right(90)
+forward(50)
+pendown()
+forward(400)
+left(180)
+
+"five row - black tile first"
+sizes = [50,50,50,50]
+for size in sizes:
+    begin_fill()
+    fillcolor('black')
+    black_row(size)
+    end_fill()
+    penup()
+    forward(size * 2)
+    pendown()
+right(90)
+forward(50)
+right(90)
+forward(400)
+left(180)
+forward(50)
+
+
+"six row - white tile first"
+sizes = [50,50,50,50]
+for size in sizes:
+    begin_fill()
+    fillcolor('black')
+    black_row(size)
+    end_fill()
+    penup()
+    forward(size * 2)
+right(90)
+forward(50)
+right(90)
+forward(50)
+pendown()
+forward(400)
+left(180)
+
+
+"seven row - black tile first"
+sizes = [50,50,50,50]
+for size in sizes:
+    begin_fill()
+    fillcolor('black')
+    black_row(size)
+    end_fill()
+    penup()
+    forward(size * 2)
+    pendown()
+right(90)
+forward(50)
+right(90)
+forward(400)
+left(180)
+forward(50)
+
+
+"eight row - white tile first"
+sizes = [50,50,50,50]
+for size in sizes:
+    begin_fill()
+    fillcolor('black')
+    black_row(size)
+    end_fill()
+    penup()
+    forward(size * 2)
+right(90)
+forward(50)
+right(90)
+forward(50)
+pendown()
+forward(400)
+left(180)
+
+
+
+forward(75)
+blue_coin(25)
 input()