Shown with a cast-on count of 19 stitches.  

• Row 1 (RS): K1, *k4, k2tog, yo, ssk, yo, repeat from * to last 2 sts, k2.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20: Purl.
• Row 3: K1, *k2, k2tog, k2, yo, ssk, yo, repeat from * to last 2 sts, k2.
• Row 5: K1, *k2tog, k4, yo, ssk, yo, repeat from * to last 2 sts, k2.
• Row 7: K1, *k1, yo, k3, k2tog, yo, ssk, repeat from * to last 2 sts, k2.
• Row 9: K1, *k3, yo, k1, k2tog, yo, ssk, repeat from * to last 2 sts, k2.
• Row 11: K2, *yo, k2tog, yo, ssk, k4, repeat from * to last st, k1.
• Row 13: K2, *yo, k2tog, yo, k2, ssk, k2, repeat from * to last st, k1.
• Row 15: K2, *yo, k2tog, yo, k4, ssk, repeat from * to last st, k1.
• Row 17: K2, *k2tog, yo, ssk, k3, yo, k1, repeat from * to last st, k1.
• Row 19: K2, *k2tog, yo, ssk, k1, yo, k3, repeat from * to last st, k1.