ペンラカラー参考

https://pbs.twimg.com/media/EeF9jlTUcAAOGo2?format=jpg&;name=large

https://pbs.twimg.com/media/EeF9jqRUYAEPuLd?format=jpg&;name=large

https://pbs.twimg.com/media/EeF9jv-U8AEY7Ea?format=jpg&;name=large