It looks complicated, but it is really a four row repeat. Web the diamond stitch is a practice commonly found in crochet, where it uses a combination of double crochet rows alternated with post stitch rolls. This video will guide you through.
How to make double crochet blanket
How to make a cat ear hat crochet
How to crochet a hat for beginners
8 Diamond Blanket Free Crochet Pattern Baby afghan crochet patterns
Visit daisyfarmcrafts.com for the full pattern: