Shown with a cast-on count of 28 stitches.  

• Row 1 (RS): P1, k1, p1, *k1, yo, p1, k2tog, p1, k1, p1, ssk, p1, yo, k1, repeat from * to last 3 sts, p1, k1, p1.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, and 18: Purl.
• Rows 3 and 15: P1, k1, p1, *k2, k2tog, yo, p1, k1, p1, yo, ssk, k2, repeat from * to last 3 sts, p1, k1, p1.
• Rows 5 and 13: P1, k1, p1, *k2tog, k1, yo, [p1, k1] twice, p1, yo, k1, ssk, repeat from * to last 3 sts, p1, k1, p1.
• Rows 7 and 11: P1, k1, p1, *k1, k2tog, yo, [p1, k1] twice, p1, yo, ssk, k1, repeat from * to last 3 sts, p1, k1, p1.
• Rows 9 and 17: P1, k1, p1, *[k2, p1] 3 times, k2, repeat from * to last 3 sts, p1, k1, p1.