Duplicate stitch is a really great way to add a colour-work motif to your knitting. It’s used as a quicker alternative to fair-isle, or to embellish a ready-made garment. This particular technique mimics stockinette stitch, and the plus side, you can easily rip it out and start again without affecting the original piece. Just be sure to count the stitches on your sample, and on your colour chart, so you can position it where you want to.
I have a series of cute critter colour charts to publish soon, including Mr. Fox up there, so watch this space. I hope you find this useful!