Here is my coaster pattern I came up with.  It took quite a few attempts to figure out just how many stitches I needed per round to get it to lie perfectly flat.  I'm still not completely satisfied; it may need just a stitch or two here and there.  I've decided to leave off the edging to keep it more flat.  I think the extra edging would make glasses unsteady.  I don't need any help when it comes to spilling things!

I started out writing down what I did on each round, but I frogged it so many times that I just got tired of scratching out and rewriting.  So my next step is to go back through, re-crochet each round to be sure I have it the way I want, and write it down as I go.  I'm learning to document my patterns so I can recreate them.  I've done a couple things just winging it, then when I wanted to do them again, it was a struggle trying to figure out what I did, especially if all I had to go by is a photograph, because I sold the original.

I can crochet pretty fast, much faster than I can knit.  When I look at this coaster, I wish I could crochet faster!  I imagine sets of coasters in all the colors of the rainbow and I want to see them before me now:)  Oh patience, will I ever learn how to embrace you?