8 moving car 1a

#General Variables
running = True
window = pygame.display.set_mode((800,600))
clock = pygame.time.Clock()

pygame.display.set_caption('Race car')

class car(pygame.sprite.Sprite):
    def __init__(self,location):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.image.load('racecar.png').convert_alpha()
        self.rect = self.image.get_rect()
        self.rect.left,self.rect.top = location
        self.x_change = 0
        self.x = 370
        self.y = 430