diff --git a/button.py b/button.py
new file mode 100644
index 0000000..a855bc2
--- /dev/null
+++ b/button.py
@@ -0,0 +1,33 @@
+import pygame.font
+
+class Button():
+
+    def __init__(self, ai_settings, screen, msg):
+        """初始化按钮属性"""
+        self.screen = screen
+        self.screen_rect = screen.get_rect()
+        
+        # 设置按钮的尺寸和属性
+        self.width, self.height = 200, 50
+        self.button_color = (0, 255, 0)
+        self.text_color = (255, 255, 255)
+        self.font = pygame.font.SysFont(None, 48)
+        
+        # 构建按钮的rect对象，并将其居中
+        self.rect = pygame.Rect(0, 0, self.width, self.height)
+        self.rect.center = self.screen_rect.center
+        
+        # 按钮消息只需要准备一次
+        self.prep_msg(msg)
+
+    def prep_msg(self, msg):
+        """将msg转换为渲染图像，并将按钮上的文本居中"""
+        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):
+        # 绘制空白按钮，然后绘制消息
+        self.screen.fill(self.button_color, self.rect)
+        self.screen.blit(self.msg_image, self.msg_image_rect)