20211003_sonic_pi.rb

live_loop :a do
  use_synth :fm
  play 60 - (ring 12, 7, 5).stretch(4).tick
  sleep 1
end

live_loop :b do
  sync :a
  with_fx :echo do
    play 72 + (ring 0, 2, 4).mirror.tick
  end
end