This Herringbone Stitch looks complicated but is very easy to do, and the sweater knits up very fast. You will impress your friends!

Editor’s suggestion for the wording of the CR1 (Cross 1) (change initalics):

The abbreviation CR1 (Cross 1) is worked on 2 stitches. By keeping yarn at back of needle and slipping next stitch purl-wise on to right hand needle, knit next stitch, bring yarn to front of work and pass the slipped stitch over these two stitches.