Shown with a cast-on count of 8 stitches.  

• Row 1 (RS): K8.
• Row 2: K4, p4.
• Row 3: Sl1 wyib, k1, yo, k1, yo, k1, k4 (10 sts).
• Row 4: K3, kfb, p6 (11 sts).
• Row 5: Sl1 wyib, k2, yo, k1, yo, k2, p1, k4 (13 sts).
• Row 6: K4, kfb, purl (14 sts).
• Row 7: Sl1 wyib, k3, yo, k1, yo, k3, p2, k4 (16 sts).
• Row 8: K5, kfb, purl (17 sts).
• Row 9: Sl1 wyib, k4, yo, k1, yo, k4, p3, k4 (19 sts).
• Row 10: K6, kfb, purl (20 sts).
• Row 11: Sl1 wyib, ssk, k7, k2tog, p4, k4 (18 sts).
• Row 12: K7, kfb, purl (19 sts).
• Row 13: Sl1 wyib, ssk, k5, k2tog, p5, k4 (17 sts).
• Row 14: K8, kfb, purl (18 sts).
• Row 15: Sl1 wyib, ssk, k3, k2tog, p4, k1, p1, k4 (16 sts).
• Row 16: K5, p1, k3, kfb, purl (17 sts).
• Row 17: Sl1 wyib, ssk, k1, k2tog, p5, k1, p1, k4 (15 sts).
• Row 18: K5, p1, k4, kfb, purl (16 sts).
• Row 19: Sl1 wyib, sl2-k1-p2sso, p6, k1, p1, k4 (14 sts).
• Row 20: K5, p1, knit.
• Row 21: BO 6 sts, knit (8 sts).
• Repeat rows 2-21.