save project

snake.py

@@ -53,10 +53,10 @@ while True:
     else:
         y += 30
 
-    if x==apple_x and y==apple_y:
-        apple_x=random.randint(0,680)
-        apple_y=random.randint(0,480)
     position.append((x, y))
+    if x==apple_x and y==apple_y:
+        apple_x=random.randint(0,22)*30
+        apple_y=random.randint(0,16)*30
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))