speaker = peripheral.wrap("left")
mobs = {
    "zombie",
    "cow",
    "pig",
    "skeleton",
    "spider",
    "sheep"
}
function sound()
while true do
    if math.random(10)>5 then
        speaker.playSound("entity."..mobs[math.random(#mobs)]..".ambient",1)
    elseif math.random(100) < 95 then
        --noteblock.setInstrument(instruments[math.random(#instruments)])
        --noteblock.play()
        --noteblock.setNote(math.random(24))
    elseif math.random(100) < 50 then
        for i = 1,5 do
            speaker.playSound("entity.creeper.step")
            sleep(0.05)
        end
        speaker.playSound("entity.creeper.primed")
    else
        --speaker.playSound("BOOM")
    end
    sleep(math.random(10,20))
    --os.reboot()
end
end
return function() 
    parallel.waitForAll(
        sound
    ) 
end