How to make sparkler / shining stars buttons

Hi

I have been learning flash 8 and want to try some cool things in it. You might have seen some shining stars or sparklers effects on buttons e.g http://theflashblog.com/?p=63

I wonder if anyone know this technique or any link to tutorial or article that teach this?

I sent many messages to this blog owner but he didn’t reply :-s

thank you very much in advance