https://i.stack.imgur.com/j9P8D.png Website: https://misztamusique.com/midi-tools

I want to make a loop in javascript where depending on how many colors you select that you want in the website. It will loop between (x) amount of midi-channels and set every note after each other to a new midi-channel/track then start again from the start. I hope this picture can show what I mean

I don't want to draw any shapes, I just want to change midi track for each individual note that comes after one another. A software called Synthesia that I use automatically draws it in different colors depending on what midi-channel it is in.