There’s an art museum in Tulsa called Philbrook, in an 1920’s house built by the Phillips family. It wasn’t the family house, it was built just for the children to live in. Later it was converted to a museum that held their art collection. In the Early Renaissance room, there’s a rug. And under that rug, there are glass blocks. And under those glass blocks, are muliticolored lights that blink disco-style if you’re brave enough to flip all the switches on the wall when security isn’t looking.