save project

snake.py

@@ -55,8 +55,9 @@ while True:
         y += 30
     position.append((x, y))
     if apple_x == x and apple_y == y:
-        apple_x = random.randint(1,21)*30
-        apple_y = random.randint(1,15)*30
+        apple_x = random.randint(0,21)*30
+        apple_y = random.randint(0,15)*30
+        position.insert(0,(x, y))
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))