---

from turtle import *

speed(0)
hideturtle()

def kvadrat(x, y, size, color_kletki):
    penup()
    goto(x, y)
    pendown()
    fillcolor(color_kletki)
    begin_fill()
    for _ in range(4):
        forward(size)
        left(90)
    end_fill()

size = 50
start_x = -200
start_y = -200

for y in range(8):
    for x in range(8):
        if (x + y) % 2 == 0:
            color_kletki = "white"
        else:
            color_kletki = "black"
        
        kvadrat(start_x + x * size, start_y + y * size, size, color_kletki)

done()