Shown with a cast-on count of 40 stitches.  

• Row 1 (RS): K10, [sl1 wyib, k1] 10 times, k10.
• Row 2: K11, [sl1 wyif, k1] 10 times, k9.
• Row 3: K9, [sl1 wyib, k1] 10 times, k11.
• Row 4: K12, [sl1 wyib, k1] 10 times, k8.
• Row 5: K8, [sl1 wyib, k1] 10 times, k12.
• Row 6: K13, [sl1 wyib, k1] 10 times, k7.
• Row 7: K7, [sl1 wyib, k1] 10 times, k13.
• Row 8: K14, [sl1 wyif, k1] 10 times, k6.
• Row 9: K6, [sl1 wyib, k1] 10 times, k14.
• Row 10: K15, [sl1 wyib, k1] 10 times, k5.
• Row 11: K5, [sl1 wyib, k1] 10 times, k15.
• Row 12: K16, [sl1 wyib, k1] 10 times, k4.
• Row 13: K4, [sl1 wyib, k1] 10 times, k16.
• Row 14: K17, [sl1 wyib, k1] 10 times, k3.
• Row 15: K3, [sl1 wyib, k1] 10 times, k17.
• Row 16: K18, [sl1 wyib, k1] 10 times, k2.
• Row 17: K2, [sl1 wyib, k1] 10 times, k18.
• Row 18: K19, [sl1 wyib, k1] 10 times, k1.