Hello Arduino people! :)
I made a painting to spy on my guests.
I've printed a picture of Barad-Dur on the canvas.
Cut a hole on the Sauron's eye place for a spotlight with a focused beam.
I connect the spotlight to the painting throw 2 servos and servo brackets.
To make the beam more visible I added a fog from a fog machine.
For Arduino, I used Sharp Range Meter with a range from 0.2 to 1.5 meters.
I write the code in XOD. You can download it here - https://goo.gl/p8UETg
You can find more instructions here: https://youtu.be/fwXEOux4gJE