https://en.wikipedia.org/wiki/Francis_Tsai
ref - https://www.reddit.com/r/todayilearned/comments/dnczd3/til_of_francis_tsai_an_artist_who_did_work_for/
origin - https://www.pipiscrew.com/?p=15610 an-artist-who-did-work-for-marvel-and-was-later-diagnosed-with-als-when-the-disease-paralyzed-his-arms-he-learned-to-draw-using-his-right-foot-on-an-iphone-when-he-was-no-longer-able-to-use-his-fe