Set up: CO 3 sts and increase to 15 after first working 2 rows: K1, p1, k1.
Increase rows: 1) K1, yo, p1, yo, k1; 2) K2, p1, k2; 3) K2, yo, p1, yo, k2; 4) K2, p3, k2; 5) K2, yo, k1, p1, k1, yo, k2;
6) K2, p5, k2; 7) K2, yo, k2, p1, k2, yo, k2; 8) K2, p7, k2; 9) K2, yo, k3, p1, k3, yo, k2; 10) K2, p9, k2; 11) K2, yo, k4, p1, …
Set up: CO 3 sts and increase to 15 after first working 2 rows: K1, p1, k1.
Increase rows: 1) K1, yo, p1, yo, k1; 2) K2, p1, k2; 3) K2, yo, p1, yo, k2; 4) K2, p3, k2; 5) K2, yo, k1, p1, k1, yo, k2;
6) K2, p5, k2; 7) K2, yo, k2, p1, k2, yo, k2; 8) K2, p7, k2; 9) K2, yo, k3, p1, k3, yo, k2; 10) K2, p9, k2; 11) K2, yo, k4, p1, k4, yo, k2 (15 sts)
Continue borders as established (K2, yo ….. yo, k2) on RS rows. On WS rows, K2, purl to last to sts, K2, if preferred. Work additional 20-row sections by increasing bracketed repetitions as required.
Shown with a cast-on count of 15 stitches.