I often record or document natural light around my house, as I find the patterns and movement to be interesting. I did so this morning. Later I went to FaceBook, and a friend had shared a 1966 work, by Julio LeParc: Single Band in Contortion. His was a mechanical construction with light, created using a single light source and a motor. I was struck by the similarities, so created this video to compare them. My recording of natural light is on the left, with the white stool, if that is not obvious.