PaymentDoorMenu

rednet.open("left")
local selection = 1

local function cPrint(height, string)
    local w,h = term.getSize()

    xPos = w/2 - string.len(string)/2
    term.setCursorPos(xPos, height)
    term.write(string)
end

local function printDoorMenu()
    if selection == 1 then cPrint(6, ">> Open")
    else                   cPrint(6, "   Open") end

    if selection == 2 then cPrint(7, ">> Close")
    else                   cPritn(7, "   Close") end

    if selection == 3 then cPrint(8, ">> Exit")
    else                   cPrint(8, "   Exit") end
end

while true do
    term.clear()
    term.setCursorPos(1,1)
    pritnDoorMenu()

    event, key = os.pullEvent("key")

    if key == 200 and selection > 1 then selection = selection-1
    else if key == 208 and selection < 3 then selection = selection+1
    end

    if selection == 1 and key == 28 then
        rednet.send(174, "open")
        rednet.send(173, "open")
        cPrint(10, "Door Opened.")
        sleep(2)
    elseif selection == 2 and key == 28 then
        rednet.send(174, "close")
        rednet.send(173, "close")
        cPrint(10, "Door Closed.")
        sleep(2)
    elseif selection == 3 and key == 28 then
        os.reboot()
    end
end