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

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


    function newline()
            local x, y  = term.getCursorPos()
            term.setCursorPos(x, y + 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)
            flie.close()
    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()
                    return b;
            end
    end

    function keyControll()
            while true do
                local sEvent, param = os.pullEvent("key")
            if sEvent == "key" then
                if param == "45" then
                                    if redstone.getOutput(reactor_pos) then
                                            return "stop"
                                    else
                                            return "start"
                                    end
                            end
                    end
            end
    end

    function Menu()
            clear()
            term.setCursorPos(19, 8)
            if redstone.getOutput(sides[reactor_pos]) then
                    term.write("ALL WORKS!")
            else
                    term.write("NOTHING WORKS!")
            end
            term.setCursorPos(15, 9)
            term.write("REACTOR IS ON "..sides[reactor_pos])
            term.setCursorPos(15, 10)
            term.write("PRESS X TO CHANGE")

    end
    --

    if not fs.exists(reactor_file) then
    setReactorPos()
    else
            local file = fs.open(reactor_file, "r")
            reactor_pos = sides[tonumber(fs.readAll())]
            file.close()
    end

    while true do
            command, id = parallel.waitForAny(rednetControll, keyControll, Menu)
            if command == "start" then
                    redstone.setOutput(reactor_pos, 1)
                    if not id == nil then
                            rednet.send(id, true)
                    end
            elseif command == "stop" then
                    redstone.setOutput(reactor_pos, 0)
                            if not id == nil then
                            rednet.send(id, false)
                    end
            elseif command == "state" then
                    rednet.send(id, redstone.getOutput(reactor_pos))
            end
    end