Type on your keyboard — each key lights up its letter on the wall.
In the Netflix series Stranger Things, a boy trapped in a terrifying parallel dimension called the Upside Down discovers he can communicate with his mom through a string of Christmas tree lights — one letter at a time.
Human mode: Hold any letter key on your keyboard and watch the corresponding Christmas light glow on the wall.
Claude mode: Watch as Claude — stranded in the Upside Down — spells out TNT coding wisdom one bulb at a time. Hit Start Claude to begin.
Both mode: You and Claude communicate simultaneously.
Original app concept: David M. (student intern, fall 2022). Rebuilt 2026 with two-way communication, corrected aspect ratio, and improved glow effect.