display.py

import sys
import time
#import and init pygame
import pygame
pygame.init() 

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

basicFont = pygame.font.SysFont(None, 228)
count = 4
last_count_time = 0

infoObject = pygame.display.Info()

#create the screen
window = pygame.display.set_mode((640, 480))
pygame.display.set_caption('Hello world!')

def loop():
	global count
	global last_count_time
	window.fill(WHITE)
	if count == 0:
		pass
	elif time.time() - last_count_time >= 1:
		count = count - 1
		last_count_time = time.time()
	#draw text
	text = basicFont.render(str(count), True, BLACK)
	textRect = text.get_rect()
	textRect.left = (window.get_rect().centerx - 200)
	textRect.centery = window.get_rect().centery
	
	window.blit(text, textRect)

	#draw it to the screen
	pygame.display.flip() 

def my_quit():
	pygame.quit
	sys.exit(0)

	
#input handling (somewhat boilerplate code):
while True:
	
	
	loop()
	
	for event in pygame.event.get(): 
			
		if (event.type is pygame.KEYDOWN and event.key == pygame.K_ESCAPE) or event.type == pygame.QUIT :
			my_quit()
			
		if (event.type is pygame.KEYDOWN and event.key == pygame.K_f):
			if window.get_flags() & pygame.FULLSCREEN:
				pygame.display.set_mode((640, 480))
				#loop()
			else:
				pygame.display.set_mode((infoObject.current_w, infoObject.current_h), pygame.FULLSCREEN) 
				#loop()
		else: 
			print event