save project

snake.py

@@ -55,7 +55,10 @@ while True:
     if x==apple_x and y==apple_y:
         num1=random.randint(1,22)
         num2=random.randint(1,16)
-    position.pop(0)
+        apple_x=num1*30-30
+        apple_y=num2*30-30
+    else:
+        position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去