How to Crochet a Simple Cord for beginners – step-by-step video tutorial. For crochet beginner's, it will introduce the weave of simple basic: a foundation chain, double crochet (dc), triple crochet (trc), picot, slip and shell stitches. Shell stitch. Two, three, or more stitches may be worked into the same place to make a fan of stitches, often also called a shell.