How to Crochet a Flower Coaster Motif – video tutorial. Free coaster motif pattern. For crochet beginner's, it will introduce the weave of simple basic: a magic ring, single crochet (sc), double crochet (dc), slip and puff stitches. A Puff Stitch. To crochet a puff stitch, you half-close several stitches worked in the same stitch and then join them together to finish the stitch.