Engine controllers program

function wait ( time )
  local timer = os.startTimer(time)
  while true do
    local event = {os.pullEvent()}
    if (event[1] == "timer" and event[2] == timer) then
      break
    elseif event[1] == "monitor_touch" then
		print("Other event catched")
    end
  end
end

function turnOffEngine()
	redstone.setOutput("right", true)
	wait(2)
	redstone.setOutput("right", false)
end

function turnOnEngine()
	redstone.setOutput("left", true)
	wait(8)
	redstone.setOutput("left", false)
end

function getEvent()
    local event, modemSide, senderChannel, replyChannel, message, senderDistance = os.pullEvent("modem_message")

    --print("I just received a message on channel: "..senderChannel)
    --print("The message was: "..message)

	-- Tells to turn on engine
	if message == "turn_on" then
		turnOnEngine()
	-- Turn off the engine
	elseif message == "turn_off" then
		turnOffEngine()
	end

	getEvent()
end

engine_number = tonumber(arg[1])
modem = peripheral.wrap("top")
modem.open(engine_number)
getEvent()