the piece begins on a c major chord (patterns one through seven) with a strong emphasis on the mediant e and the entrance of the note f which begins a series of slow progressions to other chords suggesting a few subtle and ambiguous changes of key, the last pattern being an alteration between b and g. though the polyphonic interplay of the various patterns against each other and themselves at different rhythmic displacements is of primary interest, the piece may be considered heterophonic.