rendering board from board.py with render_board() function

board.py

@@ -1,6 +1,19 @@
 import pygame as pg    
 
 def render_board():
+    
+    size = 900
+
+    #start pygame
+    pg.init()
+    screen = pg.display.set_mode((size, size)) #window (size)
+    
+
+    color = (255, 255, 255)    #rectangle color
+    sizeW = size / 8    #rectangle size
+    sizeH = size / 8    #rectangle size
+    
+    
     posX, posY = 0, 0   #recatangle position x, recatangle position y
     s1 = True           #wether or not the first square of the row should be black or white
 
@@ -17,6 +30,3 @@ def render_board():
             posX = posX + size / 4
         posY = posY + size / 8
         s1 = not s1
-
-def test_def():
-    print("This is a test")

main.py

@@ -12,42 +12,17 @@ p6 = "king"
 line1 = [p4, p3, p2, p5, p6, p2, p3, p4]
 line2 = [p1, p1, p1, p1, p1, p1, p1, p1]
 
-size = 900
-
-#start pygame
 pg.init()
-screen = pg.display.set_mode((size, size)) #window (size)
 clock = pg.time.Clock()
 running = True
 
-color = (255, 255, 255)    #rectangle color
-sizeW = size / 8    #rectangle size
-sizeH = size / 8    #rectangle size
-
-
 while running:      #open window
 
     for event in pg.event.get():
         if event.type == pg.QUIT:
             running = False
     
-    posX, posY = 0, 0   #recatangle position x, recatangle position y
-    s1 = True           #wether or not the first square of the row should be black or white
-
-    #render frame
-    screen.fill("black")
-
-    #chess game
-    while posY < size:
-        posX = 0
-        if not s1:
-            posX = posX + size / 8
-        while posX <= size:
-            pg.draw.rect(screen, color, (posX, posY, sizeW, sizeH))
-            posX = posX + size / 4
-        posY = posY + size / 8
-        s1 = not s1
-
+    render_board()
 
     #flip display to put game on screen
     pg.display.flip()