Shown with a cast-on count of 23 stitches.  

• Row 1 (RS): [P1, k1] twice, ssk, k4, yo, k3, yo, k4, k2tog, [k1, p1] twice.
• Rows 2 and 20: [K1, p1] twice, p15, [p1, k1] twice.
• Row 3: [P1, k1] twice, ssk, k5, yo, k1, yo, k5, k2tog, [k1, p1] twice.
• Rows 4, 6, 8, 10, 12, 14, 16, and 18: [K1, p1] twice, p7, k1, p7, [p1, k1] twice.
• Rows 5 and 11: [P1, k1] twice, ssk, k3, yo, k2, p1, k2, yo, k3, k2tog, [k1, p1] twice.
• Row 7: [P1, k1] twice, ssk, k4, yo, k1, p1, k1, yo, k4, k2tog, [k1, p1] twice.
• Rows 9 and 15: [P1, k1] twice, ssk, k2, yo, k3, p1, k3, yo, k2, k2tog, [k1, p1] twice.
• Rows 13 and 19: [P1, k1] twice, ssk, k1, yo, k4, p1, k4, yo, k1, k2tog, [k1, p1] twice.
• Row 17: [P1, k1] twice, ssk, yo, k5, p1, k5, yo, k2tog, [k1, p1] twice.
• Repeat rows 1-20.