Morton Feldman (1926-1987), composed in 1953, for solo piano.
Frank Denyer - piano
This work is in a particular form of graph notation. In this case notes do not necessarily have to commence right at the beginning of a notated duration but are free to enter anywhere so long as they precisely as shown: "... things had to come in a certain time span. Now it didn't have to come axactly in the beginning of the time span, and as you know it can come anywhere, like crossing a street, that's why I called them Intersection, to me time was the distance, metaphorically, between a green light and a red light."