default
{
    touch_start(integer num_detected)
    {
        llAllowInventoryDrop(TRUE);
        llSetTimerEvent(15.0);//time in seconds
        llWhisper(PUBLIC_CHANNEL, "Drop within the next 15 seconds!");
    }

    timer()
    {
        llSetTimerEvent(0.0);
        llAllowInventoryDrop(FALSE);
    }
}