Magic Mask - animated

What is a carnival mask doing in a souvenir shop in Japan? It's anything but Japanese. There is something interesting about it, though...

My first animated gif - if it won't work, you need to save it on your computer (right click, "save as" - you know the drill). If you like it, I will animate all my sequences from now on (and maybe some of the previous ones, if I have the time).