first pygame in python

import pygame, sys
from pygame.locals import *
pygame.init()
displaysurf=pygame.display.set_mode((400,300))
pygame.display.set_caption('Hello world!!')
while True:
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
           
    pygame.display.update()

output: