use_bpm 75

live_loop :pad do
  sync :kick
  with_fx :lpf, cutoff: 40 do
    use_synth :zawa
    play chord(:A3, :major7), attack: 2, sustain: 4, release: 2
    sleep 8
    play chord(:B3, :minor7), attack: 2, sustain: 4, release: 2
    sleep 8
  end
end

Link: https://sonic-pi-gallery.s3.amazonaws.com/746ff2255b7462e83b643b9180b14c6b.wav