Как сделать камеру за игроком в pygame?

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import pygame

# Константы для окна
WIDTH = 800
HEIGHT = 600

# Константы для игры и камеры
PLAYER_WIDTH = 50
PLAYER_HEIGHT = 50
CAMERA_SPEED = 5

# Инициализация Pygame
pygame.init()
screen = pygame.display.set_mode((WIDTH, HEIGHT))
clock = pygame.time.Clock()

# Создание игрока
player_rect = pygame.Rect(0, 0, PLAYER_WIDTH, PLAYER_HEIGHT)

# Игровой цикл
running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # Перемещение игрока
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        player_rect.x -= CAMERA_SPEED
    if keys[pygame.K_RIGHT]:
        player_rect.x += CAMERA_SPEED
    if keys[pygame.K_UP]:
        player_rect.y -= CAMERA_SPEED
    if keys[pygame.K_DOWN]:
        player_rect.y += CAMERA_SPEED

    # Сдвиг камеры
    camera_x = player_rect.x - WIDTH/2
    camera_y = player_rect.y - HEIGHT/2

    # Отрисовка
    screen.fill((0, 0, 0))
    pygame.draw.rect(screen, (255, 0, 0), player_rect.move(-camera_x, -camera_y))
    pygame.display.flip()

    clock.tick(60)

pygame.quit()

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import pygame

pygame.init()

# Константы для окна
WIDTH = 800
HEIGHT = 600

# Константы для игры и камеры
PLAYER_WIDTH = 50
PLAYER_HEIGHT = 50
CAMERA_SPEED = 5

# Инициализация Pygame
screen = pygame.display.set_mode((WIDTH, HEIGHT))
clock = pygame.time.Clock()

class Camera:
    def __init__(self, width, height):
        self.camera = pygame.Rect(0, 0, width, height)
        self.width = width
        self.height = height

    def apply(self, entity):
        return entity.rect.move(self.camera.topleft)

    def update(self, target):
        x = -target.rect.x + WIDTH // 2
        y = -target.rect.y + HEIGHT // 2

        # Сдвиг камеры
        self.camera = pygame.Rect(x, y, self.width, self.height)

# Создание игрока
player_rect = pygame.Rect(0, 0, PLAYER_WIDTH, PLAYER_HEIGHT)

# Инициализация камеры
camera = Camera(WIDTH, HEIGHT)

# Игровой цикл
running = True
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    # Перемещение игрока
    keys = pygame.key.get_pressed()
    if keys[pygame.K_LEFT]:
        player_rect.x -= CAMERA_SPEED
    if keys[pygame.K_RIGHT]:
        player_rect.x += CAMERA_SPEED
    if keys[pygame.K_UP]:
        player_rect.y -= CAMERA_SPEED
    if keys[pygame.K_DOWN]:
        player_rect.y += CAMERA_SPEED

    # Обновление камеры
    camera.update(player_rect)

    # Отрисовка
    screen.fill((0, 0, 0))
    pygame.draw.rect(screen, (255, 0, 0), camera.apply(player_rect))
    pygame.display.flip()

    clock.tick(60)

pygame.quit()