SS Door Control

mon = peripheral.find("monitor")
monX, monY = mon.getSize()
redstone.setOutput("right", true)
mon.setTextScale(1)

while true do
  mon.setBackgroundColor(colors.black)
  mon.clear()
  monX, monY = mon.getSize()

  o2 = redstone.getInput("bottom")

  posX = monX / 2 - 1
  posY = 1
  mon.setCursorPos(posX, posY)

  if o2 then
    mon.setBackgroundColor(colors.green)
    mon.write("%POS%")
  else
    mon.setBackgroundColor(colors.red)
    mon.write("*NEG*")
  end

  posY = math.ceil(monY / 2)
  mon.setCursorPos(posX, posY)

  if redstone.getOutput("right") then
    mon.setBackgroundColor(colors.green)
  else
    mon.setBackgroundColor(colors.red)
  end

  mon.write("Enter")

  timer = os.startTimer(5)
  event = {os.pullEvent()}

  if event[1] == "monitor_touch" then
    if event[3] >= posX and event[3] <= posX + 5 and event[4] == posY then
      redstone.setOutput("right", not redstone.getOutput("right"))
    end
  end
end