Knitted in a multiple of 10, + 4 sts and 20-row repeat.
Row 1 – RS: P4, * k1, p4, yo, k1, yo, p4; rep from * to end.
Row 2: K4, * yo, p3, yo, k4, p1, k4; rep from * to end.
Row 3: P4, * k1, p4, yo, k5, yo, p4; rep from * to end.
Row 4: K4, * yo, p7, yo, k4, p1, k4; rep from * to end.
Row 5: P4, * k1, p4, yo, k9, yo, p4; rep from * to end.
Row 6: K4, * p2tog, p7, p2tog-b, k4, p1, k4; rep from * to end.
Row 7: P4, * k1, p4, ssk, k5, k2tog, p4; rep from * to end.
Row 8: K4, * p2tog, p3, p2tog-b, k4, p1, k4; rep from * to end.
Row 9: P4, * k1, p4, ssk, k1, k2tog, p4; rep from * to end.
Row 10: K4, * p3tog, k4, p1, k4; rep from * to end.
Row 11: P4, * yo, k1, yo, p4, k1, p4; rep from * to end.
Row 12: K4, * p1, k4, yo, p3, yo, k4; rep from * to end.
Row 13: P4, * yo, k5, yo, p4, k1, p4; rep from * to end.
Row 14: K4, * p1, k4, yo, p7, yo, k4; rep from * to end.
Row 15: P4, * yo, k9, yo, p4, k1, p4; rep from * to end.
Row 16: K4, * p1, k4, p2tog, p7, p2tog-b, k4; rep from * to end.
Row 17: P4, * ssk, k5, k2tog, p4, k1, p4; rep from * to end.
Row 18: K4, * p1, k4, p2tog, p3, p2tog-b, k4; rep from * to end.
Row 19: P4, * ssk, k1, k2tog, p4, k1, p4; rep from * to end.
Row 20: K4, * p1, k4, p3tog, k4; rep from * to end.

Knitting abbreviations:
K: Knit | P: Purl | Yo: Yarn over | K2tog: Knit 2 sts together | Ssk: Slip slip knit.
P2tog: Purl 2 sts together | P2tog-b: Purl 2 sts through back loop | P3tog: Purl 3 sts together.