Split-Flap.

A departure board going nowhere. Type a message and watch it flap into place, or leave it running and it will work through a short list of destinations it invented for itself. Three finishes — a station after dark, a station lit amber, and one that has forgotten to switch its lights off — plus a full-screen mode for taking over a wall. The original also polled a live feed through a third-party proxy; that broke the one rule this site has, so it stayed behind on the platform.