Shine/Blinking text - Help Please

I just started using Flash MX 2004 a couple of days ago and have been reading tutorial after tutorial and I’ve created many different things. I would like to know how people make the button blink with the white ontop of it. Kind of hard to explain, but picture a button with text. When you move your mouse over it, a white square fades in and out fast, like this site www.cubixdust.com when you move your mouse over “main site” and “portfolio” it blinks. Are there any tutorials that I will show me how to do this?

Also, are there any other good places to read tutorials?

Thanks and God bless,
David