Shown with a cast-on count of 11 stitches.  

• Rows 1, 3, 5, 7, 15, 17, 19, and 21 (RS): Knit.
• Row 2: Sl1 wyif, k8, yo, k2 (12 sts).
• Row 4: Sl1 wyif, k7, yo, k2tog, yo, k2 (13 sts).
• Row 6: Sl1 wyif, k6, *yo, k2tog, repeat from * to last 2 sts, yo, k2 (14 sts).
• Row 8: Sl1 wyif, k2, k2tog, [yo] twice, k2tog, k1, *yo, k2tog, repeat from * to last 2 sts, yo, k2 (15 sts).
• Rows 9 and 13: K10, p1, k4.
• Row 10: Sl1 wyif, k2tog, [yo] twice, [k2tog] twice, [yo] twice, k2tog, *yo, k2tog, repeat from * to last 2 sts, yo, k2 (16 sts).
• Row 11: K9, p1, k3, p1, k2.
• Row 12: Sl1 wyif, k2, k2tog, [yo] twice, k2tog, ssk, [yo, k2tog] 3 times, knit (15 sts).
• Row 14: Sl1 wyif, k5, ssk, [yo, k2tog] 3 times, knit (14 sts).
• Row 16: Sl1 wyif, k6, ssk, *yo, k2tog, repeat from * to last st, k1 (13 sts).
• Row 18: Sl1 wyif, k7, ssk, yo, k2tog, k1 (12 sts).
• Row 20: Sl1 wyif, k8, k2tog, k1 (11 sts).