Cast on an even number of stitches. Add 2 selvage stitches if you want to make a nice-looking edge.
Row 1 (right side) : [k1, yo&slip], repeat brackets to end
Row 2 (wrong side) : [k2tog, p1], repeat brackets to end
Row 3 (right side) : knit all sts
Row 4 (wrong side) : purl all sts
Repeat rows 1-4 as necessary for completing your project.