import pygame
import math

cell_size = 18

def update():
    global selected_x
    global selected_y
    
    mouse_x, mouse_y = pygame.mouse.get_pos()
    selected_x = math.floor(mouse_x / cell_size)
    selected_y = math.floor(mouse_y / cell_size)

def draw():
    screen.fill((0, 0, 0))

    for y in range(14):
        for x in range(19):
            # Removed: cell_size = 18
            screen.blit('covered', (x * cell_size, y * cell_size))

    # Temporary
    screen.draw.text(
        'selected x: ' + str(selected_x) + 'selected y: ' + str(selected_y),
        (0, 0), color=(0, 0, 0)
    )