Forum:How do I change the gif that is shown when publishing a page?

Hi everyone, so I saw this cool thing on the Tardis Wiki when you publish a page, it has a different gif and text that is showing the page is being published. I'm wondering how to do that. Can anyone help?

ώε ιivέ foя εvέř (talk) 14:50, September 15, 2012 (UTC)