auto save

snake.py

@@ -52,6 +52,13 @@ while True:
     else:
         y += 30
     position.append((x, y))
+    if x == apple_x and y ==apple_y;
+       z_x=random randint(1,22)
+       z_y=random randint(1，16)
+       apple_x=30*z_y-30
+       apple_y=30*z_y-30
+    else;
+        position(0)
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))