How to do something after a certain number of shakes

More android stuff below - this post is mostly to save me the effort of having to upload pics somewhere else on the web.  Proceed at your own peril :-)

Android App Inventor

So, I just got accepted to the app inventor beta.  First impressions: it's really really shiny, but there are some functions that I would really love but can't find for the life of me...

(warning - geeky stuff ahead)