Shown with a cast-on count of 18 stitches.  

• Row 1 (RS): Sl1 wyib, k1, yo, p2tog, [k2, yo, p2tog] 3 times, yo, k2 (19 sts).
• Row 2: Sl1 wyif, k14, yo, p2tog, k2.
• Row 3: Sl1 wyib, k1, yo, p2tog, k3, yo, p2tog, [k2, yo, p2tog] twice, yo, k2 (20 sts).
• Row 4: Sl1 wyif, k15, yo, p2tog, k2.
• Row 5: Sl1 wyib, k1, yo, p2tog, k4, yo, p2tog, [k2, yo, p2tog] twice, yo, k2 (21 sts).
• Row 6: Sl1 wyif, k16, yo, p2tog, k2.
• Row 7: Sl1 wyib, k1, yo, p2tog, k5, yo, p2tog, [k2, yo, p2tog] twice, yo, k2 (22 sts).
• Row 8: Sl1 wyif, k17, yo, p2tog, k2.
• Row 9: Sl1 wyib, k1, yo, p2tog, k6, yo, p2tog, [k2, yo, p2tog] twice, yo, k2 (23 sts).
• Row 10: Sl1 wyif, k18, yo, p2tog, k2.
• Row 11: Sl1 wyib, k1, yo, p2tog, k7, yo, p2tog, [k2, yo, p2tog] twice, yo, k2 (24 sts).
• Row 12: BO 6 sts, k13, yo, p2tog, k2 (18 sts).
• Repeat rows 1-12.