local sTime = os.time()
if sTime < 6 and sTime > 0 then
rs.setOutput("back", false )
else
rs.setOutput("back", true)
end

while true do
sTime = os.time()
if sTime < 6 and sTime > 0 then
os.setAlarm( 6 )
os.pullEvent("alarm")
rs.setOutput("back", true)

elseif sTime > 6 or sTime < 0 then
os.setAlarm( 0 )
os.pullEvent("alarm")
rs.setOutput("back", false )
end
end