Noisy Turtle

local speaker = peripheral.find("speaker")

local instrument = "bass"
while true do
    local timer = os.startTimer(math.random(30, 150))

    speaker.playNote(instrument , 3, 7)
    speaker.playNote(instrument , 3, 7)
    os.sleep(0.0001)

    for i = 15, 0, -1 do
        speaker.playNote(instrument , 3, 7)
        speaker.playNote(instrument , 3, 7)
        speaker.playNote(instrument , 3, 7)
        os.sleep(0.0001)
    end

    for i = 30, 0, -1 do
        speaker.playNote(instrument , 3, 1)
        speaker.playNote(instrument , 3, 1)
        speaker.playNote(instrument , 3, 1)
        os.sleep(0.001)
    end

    speaker.playNote(instrument , 3, 1)
    speaker.playNote(instrument , 3, 1)
    os.sleep(0.001)

    speaker.playNote(instrument , 3, 1)
    os.sleep(0.001)

    while true do
        local eventId, timerId = os.pullEvent("timer")
        if timerId == timer then
            break
        end
    end
end