playtune.lua

speaker = peripheral.find("speaker")
instrument = {"harp","basedrum","snare","hat","bass","flute","bell","guitar","chime","xylophone","iron_xylophone","cow_bell","didgeridoo","bit","banjo","pling"}

while 1==1 do
  speaker.playNote(instrument[math.random(16)],1,math.random(24))
  sleep(math.random(8)/8)
end