It also has some nice animations.

Anyone who is wanted to create their very own LED matrix watch may be interested in a new project which is being entered into the The 2017 Hackaday Prize competition and has been created by user Mile.

If you need to leave someone a message, you could either entrust it to a Post-It note or you could go the slightly more obvious route and use a 12-foot long LED matrix. That's what kitesurfer did, ...