'2nd Person Prelude' works like 2nd Person Adventure Book. I used to love reading those as a kid. They are different from normal linear books because the reader is given an element of choice. If you want to made one decision, jump to page 15, if you choose otherwise, jump to page 30. In this prelude, the performer is given the choice on how many times they want to repeat a certain musical cell, before moving on. It is in a similar vein to Terry Riley's ;In C'.