How to dynamically advance Gui ScrollView

I have a scrollview that is working just fine. Although, as I add content I want the scroll to advance, on its own, to the most recent addition so the user does not have to advance the scroll view. I am simulating a real-world interface and its behavior. Any insights as to how to do this?

Perhaps a way to insure the verticalThumb is always at the extent? Any thoughts on this would be appreciated.