Shown with a cast-on count of 7 stitches.  

• Rounds 1, 5, 9, 13, 17, 21, 25, 29, and 33: Knit.
• Round 2: P3, (p1, k1, p1) in next st, p3 (9 sts).
• Round 3: K4, yo, k1, yo, k4 (11 sts).
• Rounds 4, 8, 12, 16, 18, 20, 24, 26, 28, 32, and 36: Purl.
• Round 6: P5, (p1, k1, p1) in next st, p5 (13 sts).
• Round 7: Ssk, k2, [k1, yo] twice, k1, [yo, k1] twice, k2, k2tog (15 sts).
• Round 10: P7, (p1, k1, p1) in next st, p7 (17 sts).
• Round 11: Ssk, ssk, k1, [k1, yo] 3 times, k1, [yo, k1] 3 times, k1, k2tog, k2tog (19 sts).
• Round 14: P9, (p1, k1, p1) in next st, p9 (21 sts).
• Round 15: [Ssk] 3 times, [k1, yo] 4 times, k1, [yo, k1] 4 times, [k2tog] 3 times (23 sts).
• Round 19: [Ssk] 3 times, [k1, yo] 5 times, k1, [yo, k1] 5 times, [k2tog] 3 times (27 sts).
• Round 22: P11, ssp, p1, p2tog, p11 (25 sts).
• Round 23: [Ssk] 3 times, [k1, yo] 6 times, k1, [yo, k1] 6 times, [k2tog] 3 times (31 sts).
• Round 27: [Ssk] 3 times, [k1, yo] 3 times, k1, [yo, k1] 3 times, k2tog, k1, ssk, [k1, yo] 3 times, k1, [yo, k1] 3 times, [k2tog] 3 times (35 sts).
• Round 30: P17, (p1, k1, p1) in next st, p17 (37 sts).
• Round 31: [Ssk] 3 times, [k1, yo] 3 times, k1, [yo, k1] 3 times, k2tog, k2tog, k3, ssk, ssk, [k1, yo] 3 times, k1, [yo, k1] 3 times, [k2tog] 3 times (39 sts).
• Round 34: P19, (p1, k1, p1) in next st, p19 (41 sts).
• Round 35: [Ssk] 3 times, [k1, yo] 3 times, k1, [yo, k1] 3 times, k2tog, k2tog, k7, ssk, ssk, [k1, yo] 3 times, k1, [yo, k1] 3 times, [k2tog] 3 times (43 sts).