How to Crochet Hearts Cord for Beginners – video tutorial. For crochet beginner's, it will introduce the weave of simple basic: double crochet (dc), triple crochet (trc) 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.