Nuclear Camera System

monitor = peripheral.wrap("right")
while true do
    term.clear()
    term.setCursorPos(1, 1)
    print("Type LIST for camera locations or type CAM to choose which camera to view.")
    option = read()
    if option == "LIST" then -- asks to explain where each camera lies and what you will see when you select it
        term.clear()
        term.setCursorPos(1, 1)
        print("ROOM lists the various cameras for non reactor rooms.")
        print("REACTOR lists the various cameras for the nuclear reactors.")
        print("Will you list ROOM cameras or REACTOR cameras, or do you want to go BACK to the main menu?")
        option2 = read()
        if option2 == "ROOM" then
            print("01 is - Front Entrance")
            print("02 is - Entrance Hallway")
            print("03 is - South-East Hallway")
            print("04 is - Control Room 1")
            print("05 is - Development Room 1")
            print("06 is - Control Room 2")
            print("07 is - Upper Hallway")
        elseif option2 == "REACTOR" then
            print("01 is - Fluid Reactors 1 & 2")
            print("02 is - Fluid Reactors 3 & 4")
            print("03 is - EU Reactors 1 & 2")
            print("04 is - EU Reactors 3 & 4")
            print("05 is - EU Reactor 5")
            print("06 is - EU Reactor 6")
        elseif option2 == "BACK" then
            term.clear()
            term.setCursorPos(1, 1)
        end
    end
end
        else
            print("Unknown command, please input either ROOM, REACTOR or BACK.")
            sleep(6)
            term.clear()
            term.setCursorPos(1, 1)
        end
    end
    elseif option == "CAM" then
        term.clear()
        term.setCursorPos(1, 1)
        print("Will you select ROOM cameras, REACTOR cameras or will you go BACK to the main menu?")
        option3 = read()
        if option3 == "ROOM" then
            print("Please input a camera number to view that specific camera type BACK to choose a different category")
            option4 = read()
            if option4 == "01" then
                print("You are viewing - Front Entrance")
                monitor.videoChannel(8001)
            elseif option4 == "02" then
                print("You are viewing - Entrance Hallway")
                monitor.videoChannel(8002)
            elseif option4 == "03" then
                print("You are viewing - South-East Hallway")
                monitor.videoChannel(8003)
            elseif option4 == "04" then
                print("You are viewing - Control Room 1")
                monitor.videoChannel(8004)
            elseif option4 == "05" then
                print("You are viewing - Development Room 1")
                monitor.videoChannel(8005)
            elseif option4 == "06" then
                print("You are viewing - Control Room 2")
                monitor.videoChannel(8006)
            elseif option4 == "07" then
                print("You are viewing - Upper Hallway")
                monitor.videoChannel(8007)
            elseif option4 == "BACK" then
                term.clear()
                term.setCursorPos(1, 1)
            end
        end
    end
end
            else
                print("Unknown camera number, use numbers 01-07 or type BACK")
                sleep(6)
                term.clear()
                term.setCursorPos(1, 1)
            end
        end
        elseif option3 == "REACTOR" then
            print("Please input a camera number to view that specific camera type BACK to choose a different category")
            option5 = read()
            if option5 == "01" then
                print("You are viewing - Fluid Reactors 1 & 2")
                monitor.videoChannel(8021)
            elseif option5 == "02" then
                print("You are viewing - Fluid Reactors 3 & 4")
                monitor.videoChannel(8022)
            elseif option5 == "03" then
                print("You are viewing - EU Reactors 1 & 2")
                monitor.videoChannel(8023)
            elseif option5 == "04" then
                print("You are viewing - EU Reactors 3 & 4")
                monitor.videoChannel(8024)
            elseif option5 == "05" then
                print("You are viewing - EU Reactor 5")
                monitor.videoChannel(8025)
            elseif option5 == "06" then
                print("You are viewing - EU Reactor 6")
                monitor.videoChannel(8026)
            elseif option5 == "BACK" then
                term.clear()
                term.setCursorPos(1, 1)
            end
        end
    end
            else
                print("Unknown camera number, use numbers 01-06 or type BACK.")
                sleep(6)
                term.clear()
                term.setCursorPos(1, 1)
            end
        end
    else
        print("Unknown command, please input either LIST or CAM.") -- PERSONAL NOTE, ADD TERM.CLEAR AFTER EVERY MONITOR CHANGE
        sleep(6)
    end
end