Create Bubbles in Flash

I would like to build some bubbles that emerge, grow and shrink in size and eventually disappear. Roughly something like this, but a bit different: [login to view URL] In this tutorial, the bubbles are all circle, but I want bubbles with a bit curvy, which grow and shrink horizontally. Two bubbles may join together and form a bigger bubble or may split. I need only 2 bubbles.