Forum:Banner

Ok, so i'm sure all of you are familiar with the banner that appears when someone posts a message on your Talk Page right? Well on a few wikis I've noticed that the banner appears and there's a message notifying people visiting the wiki about current events on the wiki. I wish to use this on a wiki that I edit, does anyone know how I can do this?


 * That is the community corner message found at MediaWiki:Communitymessages-notice-msg--

Thanks.