Simplified Auto Lights

readout = "Awaiting time shift."

function clear()
    term.clear()
    term.setCursorPos(1,1)
end

while true do
    sunrise = os.setAlarm(6.00)
    sunset = os.setAlarm(18.00)
    event, input = os.pullEvent("alarm")
    if input == sunrise then
        redstone.setOutput("back", false)
        clear()
        print("lights off.")
    elseif  input == sunset then
        redstone.setOutput("back", true)
        clear()
        print("lights on.")
    end
end

clear()