MediaWiki:Activity.css/Activity 18.css

body.page-Special_WikiActivity { background-attachment: fixed; background-position: -50% !important; background-repeat: no-repeat!important; background-size: 120% !important; background: url("http://vignette4.wikia.nocookie.net/sonako/images/d/da/Activity_12_Background.jpg/revision/latest?cb=20151212092431"); }