Morris has put a lot of different things into this new, more open sonic territory. There are tributes to spring, notably the title of the piece, “Spring, Spring, Spring.” (It’s the name of a song in “Seven Brides for Seven Brothers.”) The dancers all wear flower garlands in their hair, and the men wear jeans in hotly vernal pink, blue, orange, yellow, and so on, with bare chests. Four of these guys stick together and zoom around wagging their rear ends naughtily.