Revise paste Untitled

import pygame as pg
pg.init()

SCREEN_WIDTH = 288
SCREEN_HEIGHT = 620

clock = pg.time.Clock()
FPS = 60
ground_scroll = 0
scroll_speed = 4
is_active = True
game_running = False
game_over = False
pipe_gap = 100
screen = pg.display.set_mode((SCREEN_WIDTH, SCREEN_HEIGHT))
pg.display.set_caption('Flappy Bird', 'Assets/yellowbird-downflap.png')

bg = pg.image.load('Assets/background-day.png')
ground_img = pg.image.load('Assets/base.png')

class Bird(pg.sprite.Sprite):
    def __init__(self, x, y):
        pg.sprite.Sprite.__init__(self)
        self.images = []
        self.index = 0
        self.counter = 0
        for i in range(1, 4):
            img = pg.image.load(f'Assets/red_bird_{i}.png')
            self.images.append(img)

self.image = self.images[self.index]
        self.rect = self.image.get_rect()
        self.rect.center = [x, y]
        self.velocity = 0
        self.clicked = False

def update(self):
        if game_running:
            self.velocity += 0.3
            if self.velocity > 8:
                self.velocity = 8
            if self.rect.bottom < 512:
                self.rect.y += int(self.velocity)
        if not game_over:
            if pg.mouse.get_pressed()[0] == 1 and not self.clicked:
                self.velocity -= 10
                self.clicked = True

if pg.mouse.get_pressed()[0] == 0:
                self.clicked = False

self.counter += 1
            flap_cooldown = 7

if self.counter > flap_cooldown:
                self.counter = 0
                self.index += 1
            if self.index >= len(self.images):
                self.index = 0
            self.image = self.images[self.index]
            self.image = pg.transform.rotate(self.images[self.index], self.velocity * -2)
        else:
            self.image = pg.transform.rotate(self.images[self.index], -90)

class Pipe(pg.sprite.Sprite):
    def __init__(self, x, y, pos):
        pg.sprite.Sprite.__init__(self)
        self.image = pg.image.load('Assets/pipe-green.png')
        self.rect = self.image.get_rect()
        if pos == 1:
            self.image = pg.transform.flip(self.image, False, True)
            self.rect.bottomleft = [x, y - int(pipe_gap / 2)]
        else:
            self.rect.topleft = [x, y + int(pipe_gap / 2)]
    def update(self):
        self.rect.x -= scroll_speed

bird_group = pg.sprite.Group()
pipe_group = pg.sprite.Group()
player = Bird(50, SCREEN_HEIGHT / 2)
bottom_pipe = Pipe(150, SCREEN_HEIGHT / 2, 1)
up_pipe = Pipe(150, SCREEN_HEIGHT / 2, -1)
pipe_group.add(bottom_pipe)
pipe_group.add(up_pipe)
bird_group.add(player)

while is_active:
    clock.tick(FPS)

screen.blit(bg, (0, 0))
    bird_group.draw(screen)
    bird_group.update()
    pipe_group.draw(screen)
    pipe_group.update()
    screen.blit(ground_img, (ground_scroll, 512))

if player.rect.bottom > 512:
        game_over = True
        game_running = False

if game_over == False:
        ground_scroll -= scroll_speed
        if abs(ground_scroll) > 35:
            ground_scroll = 0

for event in pg.event.get():
        if event.type == pg.QUIT:
            is_active = False
        if event.type == pg.MOUSEBUTTONDOWN and not game_running and not game_over:
            game_running = True

pg.display.update()
pg.quit()