Shown with a cast-on count of 4 stitches.  

• Row 1 (RS): K4.
• Row 2: P1, yo, p2, yo, p1 (6 sts).
• Row 3: K1, yo, k4, yo, k1 (8 sts).
• Row 4: P1, yo, p6, yo, p1 (10 sts).
• Row 5: K1, yo, k8, yo, k1 (12 sts).
• Row 6: P1, yo, p10, yo, p1 (14 sts).
• Row 7: K1, yo, *[k1, k1] twice, k1, k2tog, [k1, k1] twice, yo, k1, repeat from * to last st, yo, k1 (16 sts).
• Row 8: P1, yo, p1, *p2, yo, [p1, p1] twice, p2tog, [p1, p1] twice, repeat from * to last 2 sts, p1, yo, p1 (18 sts).
• Row 9: K1, yo, k2, *k1, k1, k1, k2tog, [k1, k1] twice, yo, k1, k2, repeat from * to last 3 sts, k2, yo, k1 (20 sts).
• Row 10: P1, yo, p3, *p2, p1, p1, yo, [p1, p1] twice, p2tog, p1, p1, repeat from * to last 4 sts, p3, yo, p1 (22 sts).
• Row 11: K1, yo, k4, *k1, k2tog, [k1, k1] twice, yo, k1, k1, k1, k2, repeat from * to last 5 sts, k4, yo, k1 (24 sts).
• Row 12: P1, yo, p5, *p2, [p1, p1] twice, yo, [p1, p1] twice, p2tog, repeat from * to last 6 sts, p5, yo, p1 (26 sts).
• Row 13: K1, yo, k6, [k1, k1] twice, k1, k2tog, [k1, k1] twice, yo, k1, k6, yo, k1 (28 sts).
• Row 14: P1, yo, p7, *p2, yo, [p1, p1] twice, p2tog, [p1, p1] twice, repeat from * to last 8 sts, p7, yo, p1 (30 sts).
• Row 15: K1, yo, k8, *k1, k1, k1, k2tog, [k1, k1] twice, yo, k1, k2, repeat from * to last 9 sts, k8, yo, k1 (32 sts).
• Row 16: P1, yo, p9, *p2, p1, p1, yo, [p1, p1] twice, p2tog, p1, p1, repeat from * to last 10 sts, p9, yo, p1 (34 sts).
• Row 17: K1, yo, k10, *k1, k2tog, [k1, k1] twice, yo, k1, k1, k1, k2, repeat from * to last 11 sts, k10, yo, k1 (36 sts).
• Row 18: P1, yo, p11, *p2, [p1, p1] twice, yo, [p1, p1] twice, p2tog, repeat from * to last 12 sts, p11, yo, p1 (38 sts).
• Row 19: K1, yo, [[k1, k1] twice, k1, k2tog, [k1, k1] twice, yo, k1] 3 times, yo, k1 (40 sts).
• Row 20: P1, yo, p1, [p2, yo, [p1, p1] twice, p2tog, [p1, p1] twice] 3 times, p1, yo, p1 (42 sts).
• Row 21: K1, yo, k2, [k1, k1, k1, k2tog, [k1, k1] twice, yo, k1, k2] 3 times, k2, yo, k1 (44 sts).
• Row 22: P1, yo, p3, [p2, p1, p1, yo, [p1, p1] twice, p2tog, p1, p1] 3 times, p3, yo, p1 (46 sts).
• Row 23: K1, yo, k4, [k1, k2tog, [k1, k1] twice, yo, k1, k1, k1, k2] 3 times, k4, yo, k1 (48 sts).
• Row 24: P1, yo, p5, [p2, [p1, p1] twice, yo, [p1, p1] twice, p2tog] 3 times, p5, yo, p1 (50 sts).
• Repeat rows 7-18.