A zigzag crochet afghan uses only a few stitches, and can be created in any size. An afghan or blanket with a zigzag or ripple pattern is an ideal project for using up leftover scraps of yarn since each row can be a different colour. Gauge is not important when making a zigzag afghan; just be sure that all of the yarns you use are the same weight. Use a hook that works well with the yarn you have chosen, and make a sample swatch first to be sure you are happy with the yarn and stitch combination. The only stitches you need to know to make a zigzag afghan are a basic chain and double crochet.
Choose a yarn colour for your first stripe. Make a slip knot and then chain 148.
Skip the first two chains and double crochet (DC) in the third chain.
DC in the next 6 chains, 3 DC in the next chain, DC in the next 6 chains, DC next 3 chains together. Repeat this sequence across the entire row of chains. Turn.
Change colours if desired. Chain 2 at the beginning of the row. DC in first 7 stitches, 3 DC in the next stitch, DC in the next 6 stitches, DC next 3 stitches together. Repeat this sequence across the entire row of chains. Turn.
Repeat step 4 until the afghan is your desired length, then finish off and weave in the loose ends.
While the directions here are written for worsted weight yarn, any weight can be used, just adjust the hook size as needed. Create random stripes or a repeat pattern with the different yarn colours. Use all machine washable yarns to create an afghan that is easy to care for.
Don't mix different weights of yarn in a zigzag afghan, doing so will cause the edges to become uneven.