void EventLoop::handleTimer(ALLEGRO_EVENT &e)
{
   if(e.timer.source == al_timer) {
      redraw = true;
      for(int i = 0; i < idle_timer_items.size(); i++) {
         idle_timer_items[i]->idleTimer(e.timer.count);
      }
   }
   else {
      // lookup event.source in a map to a Timer object
      // then trigger it.
   }
}