I just set up a quick geocities page so I could post the file. All my server info is on my other box and I haven't gotten around to migrating everything to the one I just built. Anyway here's the screenshot: https://www.geocities.com/aankelein/maya.html. I basically wanted to do some kind of combine so I just have the outline of the clover shape for extruding. For the example I created 3 NURB circles and used the arc tool for the first curve, then duplicated (copies, not instances) for the other curves.

UPDATE:

Went back and edited the geocities page so the picture is at normal size now. The link above is correct.