You can use a splitter plugged into these outlets to control more than two inflatables, but watch your maximum current draw. My fans are drawing 3A at 120v, which is well within the range of this outlet, but if you daisy-chain too many devices you may run into problems.

Test it out by flipping the power toggle to "reset". It's easy to head back to MakeCode and adjust the timings in the "pause" loops to make your display move the way you want.

Final Notes

This setup is not weather-proof! Place the microcontroller and relay in a safe, dry location. Putting the whole thing inside a big ziploc bag is a quick and easy solution to keep the rain or sprinklers away, for a temporary holiday installation.

My whole setup became a bit complicated with power strips, splitters and extension cords. My tentacles also have lights inside, and I wanted the lights to stay ON the entire time instead of flashing on and off with the motion, so I needed to use separate extension cords for the light strips. Be sure to have a LOT of extension cords and splitters on hand.

You will also want to secure your inflatables to your house or to something solid like a lamp post. Inflatables that were not designed to dance have a tendency to want to dance away from their power source, and you could damage your setup or your inflatable if it pulls too hard.