Rnd 1: k all sts. Rnd 2: k1, yo, k2tog; rep from * to first m, k to end of rnd. Rnd 3: k all sts Rnd 4: ssk, yo; rep from * to 1 st before first m, k to end of rnd.
Shown with a cast-on count of 26 stitches.
1 2 3 4 5 Horizontal repeats
1 2 3 4 5 Vertical repeats