Knitted in a multiple of 18 sts + 10 and 18-row repeat.
Row 1- right side: * K11, p2, k2, p2, k1; rep from * to last 10 sts, k10.
Row 2: P1, k8, p1, * p1, (k2, p2) twice, k8, p1; rep from * to end.
Row 3: * K1, p8, (k2, p2) twice, k1; rep from * to last 10 sts, k1, p8, k1.
Row 4: P10, * p1, k2, p2, k2, p11; rep from * to end.
Rows 5 to 8: Rep rows 1 to 4.
Row 9: Knit.
Row 10: (P2, k2) twice, p2, * p10, (k2, p2) twice; rep from *  to end.
Row 11: * (K2, p2) twice, k2, p8; rep from * to last 10 sts, (k2, p2) twice, k2.
Row 12: (P2, k2) twice, p2, * k8, (p2, k2) twice, p2; rep from * to end.
Row 13: * (K2, p2) twice, k10; rep from * to last 10 sts, (k2, p2) twice, k2.
Rows 14 to 17: Rep rows 10 to 13.
Row 18: Purl.

Knitting abbreviations:
K: Knit | P: Purl