This is a small group of colorful buttons with swirls which grows when you mouse over. You can easily drag ‘n drop the selected button into your stage. Then you have to connect your script to the button on your stage. The button animation uses Tweener in Actionscript 2.0 which is included. You can only open the Flash file in CS3 or higher.
I made the swirl in Illustrator CS3 and I copied it to Flash but you can also change the swirl in Flash if you want. I used a mask to make it grow. So every frame I duplicated a circle which you place. At the end you will see that it will grow.