First, you will knit the bottom ribbing in the round with smaller needles and contrasting color.
Next, you will continue knitting in the round with larger needles and main color, working a stockinette pattern, bottom up.
Next, you will separate the piece into 2 front and 2 back panels, working dec rows to create openings for the armholes, as well as a neckline.
Lastly, you will seam the shoulders together and add an optional finishing edge to the neckline (with a crochet hook and contrasting color).