Rotating forum icon when new posts

This is just a little CSS thing I use on one of my forum, to have a small animation when there are new posts in a forum.
All is in global.css

Start of the file

@-webkit-keyframes rotation {
	from { -webkit-transform: rotate(0deg); }
	to { -webkit-transform: rotate(360deg); }
}

class forum_on

.forum_on {
    color: #0094d1;
    opacity: 1;
    -webkit-animation: rotation 2s infinite linear;
}

Nota: I use a fontawesome icon in my forumbit_depth2_forum but it works with pictures too. Didn't test with sprite.