Shown with a cast-on count of 30 stitches.  

• Row 1 (RS): K3, *ssk, yo, k2tog, k6, repeat from * to last 7 sts, ssk, yo, k2tog, k3 (multiple of 9 sts, plus 9).
• Rows 2, 4, 6, and 8: P4, *(k1, p1) in next st, p8, repeat from * to last 5 sts, (k1, p1) in next st, p4 (multiple of 10 sts, plus 10).
• Row 3: K3, *k2tog, yo, ssk, k6, repeat from * to last 7 sts, k2tog, yo, ssk, k3 (multiple of 9 sts, plus 9).
• Row 5: K2, *k2tog, k1, yo, k1, ssk, k4, repeat from * to last 8 sts, k2tog, k1, yo, k1, ssk, k2 (multiple of 9 sts, plus 9).
• Row 7: K1, *k2tog, k2, yo, k2, ssk, k2, repeat from * to last 9 sts, k2tog, k2, yo, k2, ssk, k1 (multiple of 9 sts, plus 9).
• Row 9: Yo, *k2tog, k6, ssk, yo, repeat from * to last 10 sts, k2tog, k6, ssk, yo (multiple of 9 sts, plus 10).
• Rows 10, 12, 14, and 16: P9, *(k1, p1) in next st, p8, repeat from * to last st, p1 (multiple of 10 sts, plus 10).
• Row 11: Yo, *ssk, k6, k2tog, yo, repeat from * to last 10 sts, ssk, k6, k2tog, yo (multiple of 9 sts, plus 10).
• Row 13: Yo, k1, *ssk, k4, k2tog, k1, yo, k1, repeat from * to last 9 sts, ssk, k4, k2tog, k1, yo (multiple of 9 sts, plus 10).
• Row 15: Yo, k2, *ssk, k2, k2tog, k2, yo, k2, repeat from * to last 8 sts, ssk, k2, k2tog, k2, yo (multiple of 9 sts, plus 10).