Shown with a cast-on count of 6 stitches.  

• Row 1 (RS): K2, kfb, p1, k1, k1 (7 sts).
• Row 2: Sl1 wyif, purl to last 3 sts, kfb, sl2 wyif (8 sts).
• Row 3: K2, kfb, k2, p1, k1, k1 (9 sts).
• Row 4: Sl1 wyif, purl to last 3 sts, kfb, sl2 wyif (10 sts).
• Row 5: K2, kfb, knit to last 5 sts, k2tog, p1, k1, k1.
• Rows 6 and 20: Sl1 wyif, p1, k1, purl to last 3 sts, kfb, sl2 wyif (1 more st).
• Row 7: K2, kfb, knit to last 5 sts, k2tog, p1, yo, k1, yo, k1 (2 more sts).
• Rows 8 and 18: Sl1 wyif, p3, k1, purl to last 3 sts, kfb, sl2 wyif (1 more st).
• Row 9: K2, kfb, knit to last 7 sts, k2tog, p1, k1, yo, k1, yo, k1, k1 (2 more sts).
• Rows 10 and 16: Sl1 wyif, p5, k1, purl to last 3 sts, kfb, sl2 wyif (1 more st).
• Row 11: K2, kfb, knit to last 9 sts, k2tog, p1, k2, yo, k1, yo, k2, k1 (2 more sts).
• Rows 12 and 14: Sl1 wyif, p7, k1, purl to last 3 sts, kfb, sl2 wyif (1 more st).
• Row 13: K2, kfb, knit to last 11 sts, k2tog, p1, k7, k1.
• Row 15: K2, kfb, knit to last 11 sts, k2tog, p1, ssk, k3, k2tog, k1 (2 fewer sts).
• Row 17: K2, kfb, knit to last 9 sts, k2tog, p1, ssk, k1, k2tog, k1 (2 fewer sts).
• Row 19: K2, kfb, knit to last 7 sts, k2tog, p1, sl1-k2tog-psso, k1 (2 fewer sts).
• Repeat rows 5-20.