-- round "up" to absolute value, so we treat negative differently
--  that is, round (-1.5) will return -2

function round (x)
  if x >= 0 then
    return math.floor (x + 0.5)
  end  -- if positive

  return math.ceil (x - 0.5)
end -- function round

local monitor = peripheral.wrap("back")


local line = {"-", "-", "-", "-", "-", "-", "-", "-", "-", "-", "-", "-"}

while true do
	line[1] = "Welcome to the Dark Forest Reaserch Facility"
	line[2] = ""
	line[3] = "The current time is "..round(os.time())
	line[4] = ""
	line[5] = ""
	line[6] = "All unautherised personel to report to Facility Admistrators"
	line[7] = ""
	line[8] = ""
	line[9] = ""
	line[10] = ""
	line[10] = ""
	line[12] = ""

	for i = 1,12 do
		monitor.setCursorPos(1,i)
		monitor.clearLine()
		monitor.write(line[i])
	end

	sleep(0)
end