Just a quick and dirty/easy ESP8622 with 8 channel relay board running lights.
It is used for lighting up 8 letters in succession, looping indefinetly. SPDT with spring center off switch for start and stop.
The switch "on" has three modes:
short toggle: start successive lights
Longer toggle: start flashing lights
Longest toggle: start all lights on
All modes can be stopped with the switch "off"
I needed some time to figure out which pins to use without causing trouble booting the esp. Some relays will toggle/trigger on boot, so be warned!