mon.lua

screen = peripheral.find("monitor")
station = peripheral.find("Create_Station")

term.redirect(screen)

while true do
    screen.clear()
    screen.setCursorPos(1,1)

    stationName = station.getStationName()
    isTrainPresent = station.isTrainPresent()
    isTrainImminent = station.isTrainImminent()
    isTrainEnroute = station.isTrainEnroute()
    trainName = isTrainPresent and station.getTrainName() or "???"
    hasSchedule = isTrainPresent and station.hasSchedule() or "???"

    if screen.isColor() then

    screen.setBackgroundColor(colors.black)

        if isTrainPresent then screen.setBackgroundColor(colors.lime)
        elseif isTrainImminent then screen.setBackgroundColor(colors.orange)
        elseif isTrainEnroute then screen.setBackgroundColor(colors.lightBlue)
        end

    end

    print("stationName", stationName)
    print("isTrainPresent", isTrainPresent)
    print("isTrainImminent", isTrainImminent)
    print("isTrainEnroute", isTrainEnroute)
    print("trainName", trainName)
    print("hasSchedule", hasSchedule)

    sleep()
end