code: private void fireIntervalElapsed() {
  		
  		IntervalProperty[] properties = model.getProperties();
  		
  		model.refresh();
  		
  		String msg = view.formatStatusMessage(properties);
  		
  		view.logMessage(msg);
  		
  	}
docs: This event is fired each elapsed interval.  The default controller
  retrives the properties, refreshes the model(and properties),
  formats the status for logging, and finally logs the message.