To begin, you will need to know how to make a magic ring.Here is a great video tutorial on how this is done.
Once you have your magic ring, you're going to:
Ch 3, DC, ch1, *2 DC, ch 1* 5 more times, join to top of beg Ch 3, cut yarn and weave ends.
You can weave in your ends as you go, or you can wait till the end and weave them all in. Or, if you want to line it, you can just knot the ends together on the back. I mostly tried to weave as I went.