one_ups_and_mushrooms.rb

define :one_up do
  use_synth :saw
  [:e3, :g3, :e4, :c4, :d4, :g4].each do |n|
    play n, release: 0.25
    sleep 0.125
  end
end

define :powerup do
  use_synth :saw
  val = 0
  1.upto(3) do
    [55, 59, 62, 67, 71].each do |n|
      play n+val, release: 0.1
      sleep 0.0625
    end
    val = val + 4
  end
end

in_thread(name: :main) do
  loop do
    powerup
    sleep 1
    one_up
    sleep 1
  end
end