Copro Reactor 2

    reactor_pos = nil
    sides = {"top" , "bottom" , "front" , "left" , "right" , "back"}
    reactor_file = "reactor.txt"
    state_file = "state.txt"
    command = nil
    id = nil

    function clear()
            term.setBackgroundColor(colors.green)
            term.clear()
    end

    function nextLine()
    local hx, hy = term.getCursorPos()
    term.setCursorPos(hx, hy + 1)
    end

    function setReactorPos()
            clear()
            term.setCursorPos(15, 7)
            term.write("Select reactor possition")
            term.setCursorPos(15, 8)
            term.write("1: Top, 2: Bot, 3: Front")
            term.setCursorPos(15, 9)
            term.write("4: Left, 5: Right, 6: Back")
            term.setCursorPos(15, 10)
            reactor_pos = tonumber(read())
            local file = fs.open(reactor_file, "w")
            file.write(reactor_pos)
            file.close()
    end

    function saveStateOnDisk()
        local file = fs.open(state_file, "w")
        file.write(command)
        file.close()
    end

    function loadStateFromDisk()
        if fs.exists(state_file) then
            local file = fs.open(state_file, "r")
            result = tostring(file.readLine())
            file.close()
            return result
        end
        return nil
    end

    function DetectPeripheral(name)
            for i = 1, 6 do
                    if peripheral.isPresent(sides[i]) and peripheral.getType(sides[i]) == name then
                            return sides[i]
                    end
            end
            return nil
    end

    function rednetControll()
            while true do
                    wifi = DetectPeripheral("modem")
                    rednet.open(wifi)
                    a, b, c = rednet.receive()
                    id = a
                    command = b
                    return b;
            end
    end

    function keyControll()
            while true do
                local sEvent, param = os.pullEvent("monitor_touch")
        if redstone.getOutput(sides[reactor_pos]) == true then
            command = "stop"
            return 0
        else
            command = "start"
            return 0
        end
        end
    end


    function Menu()
            clear()
            term.setCursorPos(screen_width/4 , screen_height * 0.3)
            local temp = tostring(sides[reactor_pos])
            if redstone.getOutput(temp) then
                    term.write("ALL WORKS!")
            else
                    term.write("NOTHING WORKS!")
            end
        term.setCursorPos(screen_width/4 ,1 + (screen_height * 0.3) )
            term.write("REACTOR IS ON "..sides[reactor_pos])
        term.setCursorPos(screen_width/4 ,2 + (screen_height * 0.3) )
            term.write("PRESS X TO CHANGE")
        return 0
    end
    screen = peripheral.wrap(DetectPeripheral("monitor"))
    --logout protection, reactor position
    if not fs.exists(reactor_file) then
    setReactorPos()
    else
            local file = fs.open(reactor_file, "r")
            reactor_pos = tonumber(file.readLine())
            file.close()
    end
    --logout protection, reactor output
    command = loadStateFromDisk()
    if command == "start" then
        redstone.setOutput(sides[reactor_pos], true)
    end
    --mainloop
    term.redirect(screen)
    screen_width, screen_height = screen.getSize()
    while true do
            Menu()
            parallel.waitForAny(rednetControll, keyControll)
            if command == "start" then
                    redstone.setOutput(sides[reactor_pos], true)
                    saveStateOnDisk()
                            if not id == nil then
                                rednet.send(id, true)
                                id = nil
                    end
            elseif command == "stop" then
                    redstone.setOutput(sides[reactor_pos], false)
                    saveStateOnDisk()
                            if not id == nil then
                                rednet.send(id, false)
                                id = nil
                    end
            elseif command == "state" then
                    rednet.send(id, redstone.getOutput(sides[reactor_pos]))
            end
    end