Even when working with easy scarf knitting patterns ... The recommended yarn for this serene blue and green design was originally designed for crocheting granny squares, but it works great ...

Yarn in burgundy for Gryffindor, yellow for Hufflepuff, blue for Ravenclaw ... Repeat from * to ** until the scarf is the desired length. Knit 20 rows in MC. Bind off, weave in ends and sew ...