Shown with a cast-on count of 21 stitches.  

• Row 1 (RS): Sl1 wyib, yo, k2tog, yo, k1, yo, sl1-k2tog-psso, [yo, k2tog] 6 times, k1, drop st (20 sts).
• Rows 2, 4, 6, 8, 10, and 12: Yo, yo, ssk, p15, k1, yo, k2tog (21 sts).
• Row 3: Sl1 wyib, yo, k2tog, yo, k3, yo, sl1-k2tog-psso, [yo, k2tog] 5 times, k1, drop st (20 sts).
• Row 5: Sl1 wyib, yo, k2tog, yo, k5, yo, sl1-k2tog-psso, [yo, k2tog] 4 times, k1, drop st (20 sts).
• Row 7: Sl1 wyib, yo, k2tog, yo, k7, yo, sl1-k2tog-psso, [yo, k2tog] 3 times, k1, drop st (20 sts).
• Row 9: Sl1 wyib, yo, k2tog, yo, k9, yo, sl1-k2tog-psso, [yo, k2tog] twice, k1, drop st (20 sts).
• Row 11: Sl1 wyib, yo, k2tog, yo, k11, yo, sl1-k2tog-psso, yo, k2tog, k1, drop st (20 sts).