Need HELP creating a Custom graph

Hi all, I just learned about the ability to create a Custom Graph.  I need some pretty simple graphs out of my SpiraTest data, but I don't know how to structure the ESQL commands.  If anyone could provide a couple of simple examples I would greatly appreciate it. 

What I'm looking for is pretty simply, need to create a graph that shows the growth of test cases within a given Project over time.  Thanks for any input!!!