Shown with a cast-on count of 5 stitches.  

• Row 1 (RS): K2, yo, knit to last 2 sts, yo, k2 (7 sts).
• Row 2: K2, [yo, p1] 3 times, yo, k2 (11 sts).
• Row 3: K2, yo, k3, yo, k1, yo, k3, yo, k2 (15 sts).
• Row 4: K2, yo, p5, yo, p1, yo, p5, yo, k2 (19 sts).
• Row 5: K2, yo, k2, k2tog, yo, k3, yo, k1, yo, k3, yo, k2tog, k2, yo, k2 (23 sts).
• Row 6: K2, yo, p1, [yo, p2tog, p2] twice, yo, p1, yo, [p2, p2tog, yo] twice, p1, yo, k2 (27 sts).
• Row 7: K2, yo, [k2tog, yo, k2] twice, k2tog, yo, k1, yo, k1, yo, k1, yo, k2tog, [k2, yo, k2tog] twice, yo, k2 (31 sts).
• Row 8: K2, yo, p3, [yo, p2tog, p2] twice, yo, p2tog, yo, p1, yo, p2tog, yo, [p2, p2tog, yo] twice, p3, yo, k2 (35 sts).
• Row 9: K2, yo, [k2, k2tog, yo] 3 times, k3, yo, k1, yo, k3, [yo, k2tog, k2] 3 times, yo, k2 (39 sts).
• Row 10: K2, yo, p1, [yo, p2tog, p2] 4 times, yo, p1, yo, [p2, p2tog, yo] 4 times, p1, yo, k2 (43 sts).
• Row 11: K2, yo, [k2tog, yo, k2] 4 times, k2tog, [yo, k1] 3 times, yo, k2tog, [k2, yo, k2tog] 4 times, yo, k2 (47 sts).
• Row 12: K2, yo, p3, [yo, p2tog, p2] 4 times, yo, p2tog, yo, p1, yo, p2tog, yo, [p2, p2tog, yo] 4 times, p3, yo, k2 (51 sts).