import pygame
import random

WIDTH = 500
HEIGHT = 400
FPS = 60

WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)
GREEN = (0, 255, 0)
BLUE = (0, 0, 255)

pygame.init()
screen = pygame.display.set_mode((WIDTH, HEIGHT))
f1 = pygame.font.Font(None, 36)
running = True
counter = 0
number = []
x = 0
y = 0
for index in range(0,20,1):
 number.append(0)

while running:
    screen.fill(BLACK)
    for event in pygame.event.get():
        
     if event.type == pygame.QUIT:
            running = False
     if event.type == pygame.MOUSEBUTTONDOWN:
        if event.button == 1:
         x, y  = pygame.mouse.get_pos()
         x = x//100 * 100
         y = y//100 * 100
         ipos = 0
         if y//100 == 0:
          ipos = 4*(x//100)
         if y//100 == 1:
          ipos = 4*(x//100)+1
         if y//100 == 2:
          ipos = 4*(x//100)+2
         if y//100 == 3:
          ipos = 4*(x//100)+3
         number[ipos] += 1
         
    counter = 0
    for it_1 in range(0,500,100):
     for it_2 in range(0,400,100):
      pygame.draw.rect(screen,WHITE, (it_1,it_2,99,99))
      font = pygame.font.SysFont(None, 34)
      img = font.render(str(number[counter]), True, BLACK)
      screen.blit(img, (it_1,it_2))
      counter = counter + 1

    pygame.display.update()
    
pygame.quit()