diff --git a/1.py b/1.py
deleted file mode 100644
index 4b394a1..0000000
--- a/1.py
+++ /dev/null
@@ -1,40 +0,0 @@
-import pygame
-from pygame.sprite import Sprite
-
-
-class Alien(Sprite):
-    """表示单个外星人的类"""
-
-    def __init__(self, ai_settings, screen):
-        """初始化外星人并设置其他位置"""
-        super(Alien, self).__init__()
-        self.screen = screen
-        self.ai_settings = ai_settings
-
-        # 加载外星人图像，并设置其rect属性
-        self.image = pygame.image.load('images/alien.bmp')
-        self.rect = self.image.get_rect()
-
-        # 每个外星人最初都在屏幕左上角附近
-        self.rect.x = self.rect.width
-        self.rect.y = self.rect.height
-
-        # 存储外星人的准确位置
-        self.x = float(self.rect.x)
-
-    def blitme(self):
-        """在指定位置绘制外星人"""
-        self.screen.blit(self.image, self.rect)
-
-    def check_edges(self):
-        """如果外星人位于屏幕边缘，就返回True"""
-        screen_rect = self.screen.get_rect()
-        if self.rect.right >= screen_rect.right:
-            return True
-        elif self.rect.left <= 0:
-            return True
-
-    def update(self):
-        """向右移动外星人"""
-        self.x += (self.ai_settings.alien_speed_factor * self.ai_settings.fleet_direction)
-        self.rect.x = self.x
\ No newline at end of file