Shown with a cast-on count of 16 stitches.  

• Row 1 (RS): K2, *yo, k4, repeat from * to last 2 sts, yo, k2 (multiple of 5 sts, plus 5).
• Row 2: P2tog, *(k1, p1) in next st, [p2tog] twice, repeat from * to last 3 sts, (k1, p1) in next st, p2tog (multiple of 4 sts, plus 4).
• Row 3: K4, *yo, k4, repeat from * (multiple of 5 sts, plus 4).
• Row 4: P2, p2tog, *(k1, p1) in next st, [p2tog] twice, repeat from * to last 5 sts, (k1, p1) in next st, p2tog, p2 (multiple of 4 sts, plus 8).