Reply to arcade buttons with on/off light?

Hi guys, I am currently in the process of modding out an old TR-707...having it circuit bent.
What I would like to install with each effect rotary is a kill switch in the form of an arcade button that is lit up when pressed, and not lit when pressed again.

Does anyone know of such a setup, or can suggest an alternate possibility? (I've seen led's right beside buttons in some pieces of gear.)

Thanks for your time.