HELP - trying to create circular movement

as described in this tutorial:

but trying to make an object rotate around itself (a circle with art in the middle to revolve around it’s own centre)
for example, if I had a car on my screen, and wanted to make it’s wheels turn round and round, with actionscript. I’m assuming the code should be very similar to that in the tutorial, right?

if anyone could help me with changing this code i’ll be very very grateful.