Set up: Purl 1 row. If the yo sts are worked as "sl1 wyib" on Rows 2 and 6, the result will be a less open fabric.
Shown with a cast-on count of 21 stitches.
1 2 3 4 5 Horizontal repeats
1 2 3 4 5 Vertical repeats
Swatch photo uploaded by Emex