This scarf is double knit to make a reverse image on the backside. In double knitting, you get a double-thick, two-sided fabric where both sides look like the right side of a stockinette stitch fabric. Each square in the bacon scarf chart represents two stitches, one on the front and one on the back. You will knit the first stitch of the pair in the color indicated by the chart with both strands held to the back and then you will purl the second stitch with the other color with both strands held in the front.