Watch the video "Peace for Triple Piano" first: https://www.youtube.com/watch?v=HcRW3FMuttY The math, movie, and piano magic that Vi Hart and I used to make "Peace for Triple Piano". A different way to unwrap the sphere to make a flat version: https://www.youtube.com/watch?v=g3X0d5NUjjA The Making of "The Making of "Peace for Triple Piano"" https://www.youtube.com/watch?v=PDkbk4OILSw