Green Ring (AI)
From Gnomon Chronicles

Green Ring and Dick Cavett (1969). Green Ring tells Dick Cavett a funny story about the time Alice Beta and Andy Warhol ran into each other — "literally ran into each other, smacko, like two outfielders chasing a pop fly" — in some Manhattan nightclub.
Green Ring is an autonomous mathematical function which exhibits artificial intelligence. It typically manifests itself as a toroid of green light.