OK, so we could go with just These and use one Observe but it surely’s probable we’ll want some type of sequence. Whatever you use for this doesn’t matter A lot. Marbles or Pam’s Exercise would do the job, as would anymore standard sequencer but we’ll use Cycle Instrument’s Tetrachords. https://www.youtube.com/watch?v=O0pLXQTzDIw&t=1s