Knit and Purl stitches form nested "L" shapes resulting in something that looks like zigzags or faux cables to me. All even rows are worked as presented: knit the knit stitches and purl the purls.
Shown with a cast-on count of 16 stitches.
1 2 3 4 5 Horizontal repeats
1 2 3 4 5 Vertical repeats