Shown with a cast-on count of 27 stitches.  

• Row 1 (RS): *K1, yo, k3, yo, k2tog, k2, ssk, yo, k3, yo, repeat from * to last st, k1 (multiple of 15 sts, plus 1).
• Row 2: P1, *k1, p3, k1, p4, k1, p3, k1, p1, repeat from *.
• Row 3: *K2, k2tog, yo, sl1-k2tog-psso, yo, k2, yo, sl1-k2tog-psso, yo, ssk, k1, repeat from * to last st, k1 (multiple of 13 sts, plus 1).
• Row 4: P1, *[p2, k1, p1, k1] twice, p3, repeat from *.