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happy_birthday_1 by mattheww 

require "bloops"

def make_instrument b, sound_shape, volume, sustain, attack, decay
  instrument = b.sound sound_shape
  instrument.volume = volume
  instrument.sustain = sustain
  instrument.attack = attack
  instrument.decay = decay
  return instrument
end

def make_bloops speed, melody
  b = Bloops.new
  b.tempo = speed
  instrument = make_instrument b, Bloops::SAWTOOTH, 0.8, 0.6, 0.1, 0.2
  b.tune instrument, melody
  return b
end

def play_happy
  happy_1 = '6c 12c 4d 4c 4f 2e '
  happy_2 = '6c 12c 4d 4c 4g 2f '
  happy_3 = '6c 12c + 4c - 4a 4f 4e 2d '
  happy_4 = '6a# 12a# 4a 4f 4g 2f '

  b = make_bloops 180, happy_1 + happy_2 + happy_3 + happy_4
  b.play
end


Shoes.app :title => "Happy Birthday!", :width => 740, :height => 600 do
  background black
  play_happy

end