Shown with a cast-on count of 15 stitches.  

• Row 1 (RS): Sl1 wyif, k1, yo, p2tog, k2, [[yo] twice, k2tog] 4 times, k1 (19 sts).
• Row 2: Yo, k2tog, k1, p1, [k2, p1] 3 times, k2, yo, p2tog, k2.
• Row 3: Sl1 wyif, k1, yo, p2tog, k2, [[yo] twice, k2tog] 6 times, k1 (25 sts).
• Row 4: Yo, k2tog, k1, p1, [k2, p1] 5 times, k2, yo, p2tog, k2.
• Row 5: Sl1 wyif, k1, yo, p2tog, k2, [[yo] twice, k2tog] 9 times, k1 (34 sts).
• Row 6: Yo, k2tog, k1, p1, [k2, p1] 8 times, k2, yo, p2tog, k2.
• Row 7: Sl1 wyif, k1, yo, p2tog, knit.
• Rows 8 and 10: Yo, k2tog, knit to last 4 sts, yo, p2tog, k2.
• Row 9: Sl1 wyif, k1, yo, p2tog, k2, [yo, k2tog] 13 times, k2.
• Row 11: Sl1 wyif, k1, yo, p2tog, k1, [k2, k2tog] 7 times, k1 (27 sts).
• Row 12: BO 7 sts, [k2tog, k1] 5 times, yo, p2tog, k2 (15 sts).