Shown with a cast-on count of 19 stitches.  

• Row 1 (RS): K4, yo, k2tog, k3, k2tog, yo, k3, k2tog, yo, k3.
• Row 2: Knit to last st, (k1, p1) in next st (20 sts).
• Row 3: K6, yo, k2tog, k1, k2tog, yo, k3, k2tog, yo, k4.
• Row 4: Knit to last st, (k1, p1) in next st (21 sts).
• Row 5: K8, yo, k3tog, yo, k3, k2tog, yo, k5.
• Row 6: Knit to last st, (k1, p1) in next st (22 sts).
• Row 7: K7, k2tog, yo, k3, yo, k2tog, k3, yo, k2tog, k3.
• Row 8: Knit to last 3 sts, k2tog, k1 (21 sts).
• Row 9: K5, k2tog, yo, k5, yo, k2tog, k3, yo, k2tog, k2.
• Row 10: Knit to last 3 sts, k2tog, k1 (20 sts).
• Row 11: K3, k2tog, yo, k7, yo, k2tog, k3, yo, k2tog, k1.
• Row 12: Knit to last 3 sts, k2tog, k1 (19 sts).