diff --git a/button.py b/button.py
index 88d22cd..7fa359c 100644
--- a/button.py
+++ b/button.py
@@ -1,5 +1,7 @@
 import pygame.font
-class play_Button():
+
+
+class play_Button:
     def __init__(self, ai_settings, screen, msg):
         """初始化按钮的属性"""
         self.screen = screen
@@ -14,13 +16,14 @@ class play_Button():
         # self.rect.center = self.screen_rect.center
         # 按钮的标签只需创建一次
         self.prep_msg(msg)
+
     def prep_msg(self, msg):
         """将msg渲染为图像，并使其在按钮上居中"""
         self.msg_image = self.font.render(msg, True, self.text_color, self.button_color)
         self.msg_image_rect = self.msg_image.get_rect()
         self.msg_image_rect.center = self.rect.center
+
     def draw_button(self):
         # 绘制一个用颜色填充的按钮，在绘制文本
         self.screen.fill(self.button_color, self.rect)
         self.screen.blit(self.msg_image, self.msg_image_rect)
-    
\ No newline at end of file