Simplified Auto Lights mk2

readout = "Awaiting time shift."

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

while true do
    local ntime = os.time()
    print("Time: "....textutils.formatTime( nTime, false ))
    if (ntime>5.59) and (ntime<18.00) then
        redstone.setOutput("back", false)
        print("Lights off.")
    elseif (ntime<6.00) and (ntime>17.59) then
        redstone.setOutput("back", true)
        print("Lights on.")
    end
end