Based on tempest for eliza: http://www.erikyyy.de/tempest/
and tempest-AM: https://github.com/priikone/tempest-AM
made so you can play the keyboard like a piano, and with pretty colors, for
example a C7 chord looks like:
badly playing entre dos aguas: https://www.youtube.com/watch?v=OwTmA8pJmEw