Shown with a cast-on count of 15 stitches.  

• Round 1: K1, p1, *k3, p1, repeat from * to last st, k1.
• Round 2: *P3, k1, repeat from * to last 3 sts, p3.
• Round 3: K1, M1L, *p1, k3, repeat from * to last 2 sts, p1, M1R, k1 (multiple of 4 sts, plus 5).
• Rounds 4 and 6: P4, k1, *p3, k1, repeat from * to last 4 sts, p4.
• Round 5: K2, p1, *k3, p1, repeat from * to last 2 sts, k2.
• Round 7: K1, M1L, k1, *p1, k3, repeat from * to last 3 sts, p1, k1, M1R, k1 (multiple of 4 sts, plus 7).
• Rounds 8 and 10: P1, k1, *p3, k1, repeat from * to last st, p1.
• Round 9: *K3, p1, repeat from * to last 3 sts, k3.
• Round 11: K1, M1L, k2, *p1, k3, repeat from * to last 4 sts, p1, k2, M1R, k1 (multiple of 4 sts, plus 9).
• Rounds 12 and 14: P2, k1, *p3, k1, repeat from * to last 2 sts, p2.
• Round 13: K4, *p1, k3, repeat from * to last 5 sts, p1, k4.
• Round 15: K1, M1Lp, *k3, p1, repeat from * to last 4 sts, k3, M1Rp, k1 (multiple of 4 sts, plus 7).
• Round 16: P3, *k1, p3, repeat from *.