How to crochet Hearts Cord for beginners – step-by-step video tutorial. For crochet beginner's, it will introduce the weave of simple basic: a foundation chain, single crochet, double crochet, triple crochet, shell and slip 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.