Shown with a cast-on count of 21 stitches.  

• Rounds 26, 28, 30, 32, 34, 36, 48, and 50: Knit.
• Round 27: *K2, k2tog, yo, k1, yo, k2tog, repeat from *.
• Round 29: *K4, yo, k1, yo, k2tog, repeat from * (multiple of 8 sts).
• Round 31: *K5, yo, k1, yo, k2tog, repeat from * (multiple of 9 sts).
• Round 33: *K6, yo, k1, yo, k2tog, repeat from * (multiple of 10 sts).
• Round 35: *K7, yo, k1, yo, k2tog, repeat from * (multiple of 11 sts).
• Round 37: K3, *yo, k11, repeat from * to last 8 sts, yo, k8 (multiple of 12 sts, plus 12).
• Round 38: CO 1 st, knit to last st, drop st.
• Round 39: *K4, yo, k1, yo, k4, sl1-k2tog-psso, repeat from *.
• Rounds 40, 42, 44, and 46: Drop st, knit, CO 1 st.
• Round 41: *[K3, yo] twice, k3, sl1-k2tog-psso, repeat from *.
• Round 43: *K2, yo, k1, yo, sl1-k2tog-psso, yo, k1, yo, k2, sl1-k2tog-psso, repeat from *.
• Round 45: *K1, [yo, k3, yo, k1] twice, sl1-k2tog-psso, repeat from * (multiple of 14 sts).
• Round 47: *Yo, k1, yo, sl1-k2tog-psso, yo, k3, yo, sl1-k2tog-psso, yo, k1, yo, sl1-k2tog-psso, repeat from *.
• Round 49: *K2, yo, k3, yo, sl1-k2tog-psso, [yo, k3] twice, repeat from * (multiple of 16 sts).