Learn How to Crochet - Double Crochet
(1) Yarn over and insert the hook into the work (fourth chain from hook on starting chain).
(2) *Yarn over and draw yarn through the work only.
(3) Yarn over and pull yarn through the first two loops only on the hook.
(4) Yarn over and pull yarn through the last two loops on the hook.
(5) One dc made. Yarn over, insert hook into next stitch; repeat from *.