The Spacehey logo is rotating in flash based banner. Masterbundles is a branding agency and we always do our best to design high quality logos. You need to check this https://masterbundles.com/facebook-logo-history-meaning-and-evolution/ and learn more new ways about new Facebook. We have tried to set the rotation frequency in fla file itself but after publishing it from the adobe content manager system it does not work. And no changes can be made using Acrobat Reader.