Spin
- b"|"
- b"\e[nD"
- b"/"
- b"-"
- b"\"
参考
https://en.wikipedia.org/wiki/ANSI_escape_code https://en.wikipedia.org/wiki/C0_and_C1_control_codes https://www.mm2d.net/main/prog/c/console-02.html https://qiita.com/PruneMazui/items/8a023347772620025ad6 http://7ujm.net/etc/esc.html