Making a blob in Flash part 1

I was wandering around triquitips and I saw an thread about how to make a soft body physics in Flash.
It took me some time to make, but I just finished a simple 'soft body' exapmple:

http://www.swfme.com/view/1175742

Well, it's quite simple and basic, but that's the idea.
I'm going to guide you throught all world of Physics, starting with verlet, constraints, and all other maths involved in the making of a blob.

So, stay toned!