A tutorial ...

... somewhere, maybe?

I was wondering if someone might be able to point me in the direction of a tutorial on how to do this kind of animation (and what's in the icon I've posted with) in Photoshop Imageready 7.0

- icon from Twinkle Icons

Really, basically, looking to find out how to do the blinky, twinkly animation. Again, if someone can point me to an already existing tutorial.

Thanks in advance.