This is a pattern repeat multiple of 8. End the total number of repeats with k2 to bookend it nicely.
R1: *k2, yo, k1, yo, k2, s1, k2tog., psso,* repeat. End row or round with k2.
R2: Purl all stitches if wrongside; knit all stitches if rightside.
Psso = pass knitwise the previously slipped stitch over the just completed stitch, the k2tog. in this case.
You can see an early example photographed here by me.
Or photographed more beautifully here by Ernesto Padro Campos.