Global Event gamestate_closed

[Morcega Negra]

Hello I have a version of TFS that the only way to save the server is to the command / closeserver with GM, other ways to save him from error, I wonder how to make a global event that CloseServer and after five minutes he gives OpenServer.

That's my talkaction of /closeserver / OpenServer:

function onSay(cid, words, param, channel)
    local state = GAMESTATE_CLOSED
    if(words:sub(2, 2) == "o") then
        state = GAMESTATE_NORMAL
    end

    local str = "Failed to " .. (state == GAMESTATE_CLOSED and "close" or "open") .. " server."
    if(doSetGameState(state) ~= LUA_ERROR) then
        str = "Server has been " .. (state == GAMESTATE_CLOSED and "closed" or "opened") .. " successfully."
    end

    doPlayerSendTextMessage(cid, MESSAGE_STATUS_CONSOLE_BLUE, str)
    return TRUE
end

I want to turn into globalevent that the close and after 5 min open