afni.nimh.nih.gov

I'm new to AFNI and have a simple paradigm that I would like to specify and calculate. I've read through the howto notes, etc but none explain how to set up and run a simple on-off paradigm. I have 20 sec. off (8 images) and 40 sec on (16 image), repeated twice (so a total of 48 images, TR=2500ms.) How can I set this up so I can see which regions are active in the on condition?

Many thanks,
Jen