[Zope] Simple Counter in zope?

Hi guys.. I'd like to implement a simple counter in zope (I'm surprised I couldnt find one already actually).. So I imagine something like this is pretty simple, but I have no idea where to start.. My first thought was just to create a new variable, and have the DHTML write to it, but it doesn't seem like that's possible. How do I create new values in the zope db, access them and assign things to them? Thanks! -Nic