所以我运行代码，它就开始不正常了。我不熟悉pygame。
代码如下：

import pygame

pygame.init()
# Screen (Pixels by Pixels (X and Y (X = right and left Y = up and down)))
screen = pygame.display.set_mode((1000, 1000))
running = True
# Title and Icon
pygame.display.set_caption("Space Invaders")
icon = pygame.image.load('Icon.png')
pygame.display.set_icon(icon)
# Player Icon/Image
playerimg = pygame.image.load('Player.png')
playerX = 370
playerY = 480

def player(x, y):
    # Blit means Draw
    screen.blit(playerimg, (x, y))


# Game loop (Put all code for pygame in this loop)
while running:
    screen.fill((225, 0, 0))
    pygame.display.update()

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
    # if keystroke is pressed check whether is right or left
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                print("Left arrow is pressed")

            if event.key == pygame.K_RIGHT:
                print("Right key has been pressed")


            if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                print("kEYSTROKE RELEASED")

    # RGB (screen.fill) = red green blue

    player(playerX, playerY)
    pygame.display.update()

这张图片并不是我不能发布视频的那个，但它确实是我的代码的作用