import pygame, sys
from pygame. locals import *

pygame.init()
DISPLAYSURF = pygame.display.set_mode((400,300))
pygame.display.set_caption('Hello World')
while True: # main game loop
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
    pygame.display.update()

    while True:
        ## Processing
        ## Events
        ## Rendering
        
        pygame.display.update()
        surface = pygame.surface(50,50)
        surface.full((0,255,0))