+ write_uint16_bigendian(world->item->pos.y, file);
+ write_uint16_bigendian(world->item->pos.x, file);
+ write_uint16_bigendian(world->item->next->pos.y, file);
+ write_uint16_bigendian(world->item->next->pos.x, file);
+ write_uint16_bigendian(world->item->next->next->pos.y, file);
+ write_uint16_bigendian(world->item->next->next->pos.x, file);