Вопрос по пайтону

что делать если в коде я изменил скорость персонажа, а он всё ещё бежит, как и бежал
import pygame
clock = pygame.time.Clock()
pygame.init()
screen = pygame.display.set_mode((1280, 720 ))
myfont = pygame.font.Font('fonts/Jersey25-Regular.ttf', 40)
text_surface = myfont.render('HELLO KENTYXA', True, 'Red')
bg = pygame.image.load('images/biga.png')
walk_right = [
pygame.image.load('images/player_right/right1.png.'),
pygame.image.load('images/player_right/right4.png'),
pygame.image.load('images/player_right/right3.png.'),
pygame.image.load('images/player_right/right4.png.'),
]

player_anim_count = 0
bg_x = 0


running = True
while running:

screen.blit(bg, (bg_x, 0))
screen.blit(bg, (bg_x + 1280, 0))
screen.blit(walk_right[player_anim_count], (550, 545))
if player_anim_count ==3:
player_anim_count = 0
else:
player_anim_count += 1
bg_x -= 2
if bg_x == -1280:
bg_x = 0

pygame.display.update()
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
pygame.quit()
clock = pygame.time.Clock(1)