Shown with a cast-on count of 49 stitches.  

• Rows 1, 5, and 9 (RS): K1, [p2, k3] 9 times, p2, k1.
• Rows 2, 4, 6, 8, 10, and 12: K1, [k2, p3] 9 times, k3.
• Rows 3, 7, and 11: K1, [p2, k2tog, yo, k1] 9 times, p2, k1.
• Row 13: K1, [p2, k1, yo, k1, yo, k1, p2, k3] 4 times, p2, k1, yo, k1, yo, k1, p2, k1 (59 sts).
• Row 14: K1, [k2, p5, k2, p3] 4 times, k2, p5, k3.
• Row 15: K1, [p2, k2, yo, k1, yo, k2, p2, k2tog, yo, k1] 4 times, p2, k2, yo, k1, yo, k2, p2, k1 (69 sts).
• Row 16: K1, [k2, p7, k2, p3] 4 times, k2, p7, k3.
• Row 17: K1, [p2, k3, yo, k1, yo, k3, p2, k3] 4 times, p2, k3, yo, k1, yo, k3, p2, k1 (79 sts).
• Row 18: K1, [k2, p9, k2, p3] 4 times, k2, p9, k3.
• Row 19: K1, [p2, k4, yo, k1, yo, k4, p2, k2tog, yo, k1] 4 times, p2, k4, yo, k1, yo, k4, p2, k1 (89 sts).
• Row 20: K1, [k2, p11, k2, p3] 4 times, k2, p11, k3.