var knapp = {payload: msg.payload};

if
    (knapp==1002)
    {
        payload="resume";
        return [ msg, null, null ];

    }
else if
    (knapp==2002)
    {
        msg.payload="pause";
        return [ null, msg, null ];
    }
else if
    (knapp==3002)
    {
        msg.payload="pause";
        return [ null, null, msg ];
    }