Shown with a cast-on count of 0 stitches.  

• Row 1 (RS): CO 27 sts (27 sts).
• Rows 2, 4, and 6: Sl1 wyif, *k1, p3, k1, repeat from * to last st, k1.
• Rows 3 and 5: Sl1 wyib, *p1, k3, p1, repeat from * to last st, k1.
• Row 7: Sl1 wyib, k1, *k3, p2tog, repeat from * to last 5 sts, k3, p1, k1 (23 sts).
• Rows 8, 12, and 14: Sl1 wyib, knit.
• Rows 9, 11, 15, and 17: Sl1 wyib, knit.
• Rows 10 and 16: Sl1 wyif, purl to last st, k1.
• Row 13: Sl1 wyif, purl to last st, k1.