Shown with a cast-on count of 17 stitches.  

• Row 1 (RS): *K4, p1, k3, repeat from * to last st, k1.
• Rows 2, 8, 12, 14, and 20: P1, *p3, k1, p4, repeat from *.
• Rows 3 and 15: *K2, k2tog, p1, ssk, k1, repeat from * to last st, k1 (multiple of 6 sts, plus 1).
• Rows 4, 16, and 18: P1, *p2, k1, p3, repeat from *.
• Row 5: *K2, p3, k1, repeat from * to last st, k1.
• Row 6: P1, *p1, k3, p2, repeat from *.
• Row 7: *K3, yo, p1, yo, k2, repeat from * to last st, k1 (multiple of 8 sts, plus 1).
• Row 9: *K1, k2tog, yo, p3, yo, ssk, repeat from * to last st, k1.
• Row 10: P1, *p2, k3, p3, repeat from *.
• Row 11: *K2, k2tog, yo, p1, yo, ssk, k1, repeat from * to last st, k1.
• Row 13: *K1, k2tog, k1, yo, p1, yo, k1, ssk, repeat from * to last st, k1.
• Row 17: *K1, yo, k2tog, p1, ssk, yo, repeat from * to last st, k1.
• Row 19: *K2, yo, k1, p1, k1, yo, k1, repeat from * to last st, k1 (multiple of 8 sts, plus 1).