Shown with a cast-on count of 20 stitches.  

• Row 1 (RS): [P1, sl1 wyib, yo, p2, sl1 wyib, yo] 4 times (28 sts).
• Rows 2, 6, and 10: [Sl2 wyif, yo, k2, sl2 wyif, yo, p1] 4 times (36 sts).
• Rows 3, 7, and 11: [Sl1 wyib, yo, p3tog, p2, p3tog] 4 times (24 sts).
• Rows 4, 8, and 12: [Sl2 wyif, yo, p4] 4 times (28 sts).
• Rows 5, 9, and 13: [P3tog, sl1 wyib, yo, p2, sl1 wyib, yo] 4 times.