import pygame

def Kvad(xy):
    surf = pygame.Surface((10, 10))
    surf.fill((255, 255, 255))
    sc.blit(surf, xy)

mat = [['SPACE' for i in range(10)] for i in range(10)]

pygame.init()

sc = pygame.display.set_mode((100, 100))

surf = pygame.Surface((10, 10))

surf.fill((255, 255, 255))

pygame.display.update()
for i in range(len(mat)):
    if i%3==0:
        for j in range(len(mat[i])):
            Kvad((10*i, 10*j))
for i in range(len(mat)):
    for j in range(len(mat[i])):
        if mat[i][j] == 'BLOCK':
            Kvad((10*i, 10*j))
c = True
while c:
    for i in pygame.event.get():
        if i.type == pygame.QUIT:
            c = False
    pygame.time.delay(100)
pygame.quit()
exit()