Hourglass LED Traffic Light Design ConceptScott BealeNovember 20, 2010 Sand Glass is an interesting new interactive design concept by Thanva Tivawong for traffic lights where the time to stop and go is counted down in the form of a LED hourglass. Related Posts Scott Beale Scott Beale founded Laughing Squid in 1995 in San Francisco and is currently based in New York City. He can be found posting on Threads and sharing photos on Instagram.