Who is to say that a screensaver is no longer necessary? Not I. For me, a dark screen is a black hole that sucks down all the energy in the room. Let's keep it alive, giving something to the space...
As you may guess, I love Bruno Munari. I mean not personally, anyway, he is dead, but he was a thinker of profound thoughts, delivered often with a sense of humor. As such, his thoughts were and continued to be noticed by many, ignored by very few: a great thinker and a true creator. In 1965, Bruno Munari designed a small black box -- the austere 15-cm steel cube housed four aluminum cones, each painted half-red and half-green and set to spin at four distinct speeds on an 18-minute cycle to produce a very slowly turning composite color moving from red to green. Munari called it the Tetracono.
O-R-G, the brilliant software company, creates screensavers among other digital things. They, like Munari are great thinkers and creators. This is their Tetracono screensaver. Our first digital product at KIOSK. For every order you receive a postcard which has a unique download code for the software printed on its "holographic sticker". Software for macOS v10.10+