A very simple and easy pattern. Includes a video for how to knit the cabbage stitch. From the pattern:

This scarf is stretchy, cuddly, warm, and double sided. It has a pleasing diagonal twisty pattern. It looks good in all kinds of yarn. Tip: Use needles one or two sizes up from your usual for the chosen yarn. As far as I know, this can only be done “throwing” style (with the yarn in your right hand).