Each performer’s part is a list of eighty-one consecutive “moments.” There is no time schedule for these moments; they follow one another at any pace the performers as a group establish, and this pace can change continuously throughout the performance. At every moment at least one of the performers has an action that he must perform. Thus, the piece is no more than a play for sixteen actors, except that the actions have no dramatic continuity and are valuable only as sound or gesture events; and when more than one action occurs on the same moment, these actions must be performed simultaneously. There is no conductor, and each player privately keeps count of the moments as they pass, in order to fit his actions into the sequence of events.