Welcome back to our Arduino UNO Q Elf Detector Series! Last night, my worst fear came true ‐ I pulled out the Christmas decorations, and half the ornaments were gone. Vanished! Replaced by empty hooks and a faint smell of peppermint. The Elves struck again. I can’t trust physical decorations anymore—they are too easy to pilfer. But do you know what you can't steal? Pixels.



