diff --git a/snake.py b/snake.py
index 537316e..09dbb22 100644
--- a/snake.py
+++ b/snake.py
@@ -53,6 +53,8 @@ while True:
         y += 30
     position.append((x, y))
     position.pop(0)
+import ramnom
+
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去