#!/usr/bin/env python

import sys, pygame
pygame.init()

infos = pygame.display.Info()
# size = infos.current_w, infos.current_h
size = 1024, 768
background = 255, 255, 255

screen = pygame.display.set_mode(size)

screen.fill(background)

button = pygame.Rect(200, 200, 50, 50)
screen.fill((0,0,0), rect=button)

button2 = pygame.Rect(400, 200, 50, 50)
screen.fill((0,0,0), rect=button2)

pygame.display.flip()

i = 0

font = pygame.font.Font(None, 80)

while True:
    for event in pygame.event.get():
        if event.type in (pygame.QUIT, pygame.KEYDOWN):
            sys.exit()
        elif event.type == pygame.MOUSEBUTTONUP:
            if button.collidepoint(pygame.mouse.get_pos()):
                i += 1
            if button2.collidepoint(pygame.mouse.get_pos()):
                i -= 1

    text = str(i)
    size = font.size(text)
    ren = font.render(text, 0, (0, 0, 0))
    screen.fill(background, rect=((10,10),size))
    screen.blit(ren, (10, 10))
    pygame.display.update(((10,10),size))