Shown with a cast-on count of 22 stitches.  

• Row 1 (RS): K1, *yo, k8, k2tog, repeat from * to last st, k1.
• Row 2: P1, *p2tog, p7, yo, p1, repeat from * to last st, p1.
• Row 3: K1, *k2, yo, k6, k2tog, repeat from * to last st, k1.
• Row 4: P1, *p2tog, p5, yo, p3, repeat from * to last st, p1.
• Row 5: K1, *k4, yo, k4, k2tog, repeat from * to last st, k1.
• Row 6: P1, *p2tog, p3, yo, p5, repeat from * to last st, p1.
• Row 7: K1, *k6, yo, k2, k2tog, repeat from * to last st, k1.
• Row 8: P1, *p2tog, p1, yo, p7, repeat from * to last st, p1.
• Row 9: K1, *k8, yo, k2tog, repeat from * to last st, k1.
• Row 10: P1, *yo, p8, p2tog tbl, repeat from * to last st, p1.
• Row 11: K1, *ssk, k7, yo, k1, repeat from * to last st, k1.
• Row 12: P1, *p2, yo, p6, p2tog tbl, repeat from * to last st, p1.
• Row 13: K1, *ssk, k5, yo, k3, repeat from * to last st, k1.
• Row 14: P1, *p4, yo, p4, p2tog tbl, repeat from * to last st, p1.
• Row 15: K1, *ssk, k3, yo, k5, repeat from * to last st, k1.
• Row 16: P1, *p6, yo, p2, p2tog tbl, repeat from * to last st, p1.
• Row 17: K1, *ssk, k1, yo, k7, repeat from * to last st, k1.
• Row 18: P1, *p8, yo, p2tog tbl, repeat from * to last st, p1.