---

from turtle import *

speed(0)

def kvadrat(c):
    fillcolor(c)
    begin_fill()
    for i in range(4):
        forward(30)
        left(90)
    end_fill()

for i in range(64):
    penup()
    goto(i % 8 * 30, i // 8 * 30)
    pendown()
    
    if (i % 8 + i // 8) % 2 == 0:
        kvadrat("white")
    else:
        kvadrat("black")

done()