Launch control monitor node

-- Launch monitor prod

-- function timer
function timerlaunch()
  local mon = peripheral.find("monitor")
  local nHours = tonumber(0)
  nHours = nHours or 0
  local nMinutes = tonumber(10)
  nMinutes = nMinutes or 0
  local nSeconds = tonumber(0)
  nSeconds = nSeconds or 0
  local totalTime = (nHours * 36000) + (nMinutes * 600) + (nSeconds * 10)
  local hours, minutes, seconds, sHours, sMinutes, sSeconds, sTenths, countdownTimer, timer, _
  if mon then
    local x
    for i = 1, #mon do
      mon[i].setTextColor(colors.white)
      mon[i].setBackgroundColor(colors.black)
      mon[i].clear()
      mon[i].setTextScale(1)
      x = mon[i].getSize()
      if x == 7 then      --# width = 1
        mon[i].setTextScale(0.5)
      elseif x == 18 then --# width = 2
        mon[i].setTextScale(nHours < 10 and 2 or 1)
      elseif x == 29 then --# width = 3
        mon[i].setTextScale(3)
      elseif x == 39 then --# width = 4
        mon[i].setTextScale(4)
      elseif x >= 50 then --# width = 5+
        mon[i].setTextScale(5)
      end
    end
  end
  for i = totalTime, 0, -1 do
    hours = totalTime > 35999 and math.floor(totalTime / 36000) or 0
    sHours = tostring(hours)
    minutes = totalTime > 599 and math.floor((totalTime - (hours * 36000)) / 600) or 0
    sMinutes = minutes > 9 and tostring(minutes) or "0" .. tostring(minutes)
    seconds = totalTime > 9 and math.floor((totalTime - ((hours * 36000) + (minutes * 600))) / 10) or 0
    sSeconds = seconds > 9 and tostring(seconds) or "0" .. tostring(seconds)
    sTenths = tostring(math.floor(totalTime - ((hours * 36000) + (minutes * 600) + (seconds * 10))))
    term.setCursorPos(1, 1)
    if totalTime == 0 and term.isColor() then term.setTextColor(colors.red) end
    term.write(sHours .. ":" .. sMinutes .. ":" .. sSeconds .. ":" .. sTenths .. " ")
    if mon then
      for i = 1, #mon do
        mon[i].setCursorPos(1, 2)
        if totalTime == 0 and mon[i].isColor() then mon[i].setTextColor(colors.red) end
        mon[i].write(sHours .. ":" .. sMinutes .. ":" .. sSeconds .. ":" .. sTenths .. " ")
      end
    end
    if totalTime > 0 then
      countdownTimer = os.startTimer(0.1)
      repeat
        _, timer = os.pullEvent("timer")
        if timer == countdownTimer then
          totalTime = totalTime - 1
        end
      until timer == countdownTimer
    end
  end
end
-- function end
local mon = peripheral.find("monitor")
mon.setTextScale(4)
mon.clear()
rednet.open("top")
mon.setCursorPos(1,1)
mon.write("Listening")
mon.setCursorPos(1,2)
mon.write("for signal")
local id_1,int_check = rednet.receive()
local id_2,handshake = rednet.receive()
local id_3,startcount = rednet.receive()
local phase2 = false
repeat
    if int_check == "ping" then
--      rednet.send(senderId, "pong")
    phase2 = true
    else
    mon.clear()
    mon.setCursorPos(1,1)
    mon.write("Countdown Timer")
    mon.setTextColour(colours.red)
    mon.setCursorPos(1,2)
    mon.write("Aborted due to technical issues")
    sleep(20)
    os.reboot()
  end
until phase2 == true
local phase3 = false
repeat
    if handshake == "1" then
        mon.setCursorPos(1,1)
        mon.write("Countdown Timer")
        mon.setCursorPos(1,2)
        mon.setTextColour(colours.green)
        mon.write("Standby for launch")
    phase3 = true
    else
    mon.clear()
    mon.setCursorPos(1,1)
    mon.write("Countdown Timer")
    mon.setTextColour(colours.red)
    mon.setCursorPos(1,2)
    mon.write("Aborted due to technical issues")
    sleep(20)
    os.reboot()
  end
until phase3 == true
local phase4 = false
repeat
    if startcount == "2" then
        mon.clear()
        timerlaunch()
    phase4 = true
        os.reboot()
  else
    mon.clear()
    mon.setCursorPos(1,1)
    mon.write("Countdown Timer")
    mon.setTextColour(colours.red)
    mon.setCursorPos(1,2)
    mon.write("Aborted due to technical issues")
    sleep(20)
    os.reboot()
  end
until phase4 == true
mon.clear()
mon.setCursorPos(1,1)
mon.write("Countdown Timer")
mon.setTextColour(colours.green)
mon.setCursorPos(1,2)
mon.write("Completed")
sleep(10)
os.reboot()