停止游戏中的循环扣血显示

import pygame, sys
​
class hpbar():
    def __init__(self, hpchunk, screen, posx, posy):
        # hpchunk can either be 125 or 250
        self.hpchunk = hpchunk
        self.screen = screen
        self.posx = posx
        self.posy = posy
        self.unit_h = 18
        self.unit_w = 250
        self.image = pygame.image.load('hpbar.png')
        self.total_hp = [self.posx + 3, self.posy + 3, self.unit_w, self.unit_h]  # +3 is there due to the thickness of the actual HP bar 
        self.val_per_chunk = self.unit_w / self.hpchunk                     # units of a single chunk e.g. 250 / 125 = 2
        self.startPos = 253
        screen.blit(self.image, [self.posx, self.posy])
        pygame.draw.rect(screen, [0, 255, 0], self.total_hp, 0)
        self.current_hp = self.unit_w
​
    def loss(self, loss_val):
        self.loss_val = loss_val
        total_chunk = loss_val * self.val_per_chunk                    
        chunkPosx = self.posx + self.startPos                               # e.g. if hpchunk = 125, then the hp will be in chunks of two
        healthbar = [0, 255, 0]
        chunkRangeEnd = self.current_hp - total_chunk                           
        total_chunk = 0                                                     # first iterative value
        stop_val = chunkPosx - total_chunk
        self.current_hp -= total_chunk
​
        for lossx in range(self.current_hp, chunkRangeEnd, -self.val_per_chunk):
            pygame.draw.rect(self.screen, healthbar, self.total_hp, 0)      # hp bar 
            chunkPosx = chunkPosx - self.val_per_chunk                      # x position of chunk 
            total_chunk = total_chunk + self.val_per_chunk                  # total size of chunk
            if chunkPosx <= self.posx + 141:                                # yellow zone
                healthbar = [255, 255, 0]
            if chunkPosx <= self.posx + 48:                                 # red zone
                if self.val_per_chunk == 25:
                    healthbar = [255, 255, 255]
                else:
                    healthbar = [255, 0, 0]
            pygame.draw.rect(self.screen, [255, 0, 255], [chunkPosx, self.posy + 3, total_chunk, self.unit_h], 0)
            pygame.time.delay(200)
            pygame.display.flip()
​
​
pygame.init()
screen = pygame.display.set_mode([720, 480])
screen.fill((255, 255, 255))
pygame.display.flip()
​
while True:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            sys.exit()
​
    # test, using hp bar instance
    newbar = hpbar(125, screen, 150, 150)
    newbar.loss(5)
    pygame.display.flip()
​
    # test, using hp bar instance
    newbar.loss(3)
    pygame.display.flip()