Create pie chart with Flot graph library

Hello everybody,

I’m trying to create a pie chart integrating Vaadin 7 with the Flot graph library but without success.
I was following the demo about the integration with Vaadin for this Javascript component (https://vaadin.com/wiki/-/wiki/Main/Integrating+a+JavaScript+component) to create a plot graphic, but I was unable to do the same thing to create a pie chart graphic.

Someone could be kind to help me about it?

Thanks a lot