seems that HN won't allow him post more so he messaged me the answer:

--- yeah its funny, the first time i tried to make this was long time ago, here is the video 3 years old: https://vimeo.com/42313987

The idea was pretty spontaneous. I saw CZferro toys online and wanted to play with it so much. I ordered one and played with it and after a while i was thinking why couldnt this be something concrete. I loved the idea of translating something thats abstract in a visual sense to a concrete thing and back.

After that a clock came as a logical object, since it changes non stop.