Shown with a cast-on count of 20 stitches.  

• Row 1 (RS): P1, *k1, k2tog, yo, k1, p1, k1, yo, ssk, k1, repeat from * to last st, p1.
• Rows 2, 4, 6, 8, 10, and 12: P1, *p4, k1, p4, repeat from * to last st, p1.
• Row 3: P1, *k2, ssk, yo, p1, yo, k2tog, k2, repeat from * to last st, p1.
• Row 5: P1, *k1, k2tog, k1, yo, p1, yo, k1, ssk, k1, repeat from * to last st, p1.
• Row 7: P1, *k2, yo, ssk, p1, k2tog, yo, k2, repeat from * to last st, p1.
• Row 9: P1, *k2tog, yo, [p1, k1] twice, p1, yo, ssk, repeat from * to last st, p1.
• Row 11: P1, *ssk, yo, [p1, k1] twice, p1, yo, k2tog, repeat from * to last st, p1.