#!/usr/bin/env python3

import sys
import time

import pygame


def refresh_screen():
    for row_idx, row in enumerate(grid):
        for col_idx, element in enumerate(row):
            if element is not None:
                screen.blit(white_piece, (col_idx * 50 + 1, row_idx * 50 + 1))

pygame.init()

black = (0, 0, 0)
white = (0xff, 0xff, 0xff)

white_piece = pygame.Surface((48, 48))
white_piece.fill(white)

screen = pygame.display.set_mode((500, 1000))

grid = [[True for _ in range(10)] for _ in range(20)]

while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()

    time.sleep(.1)
    refresh_screen()
    pygame.display.flip()