Textured Knitting 18: Thorn

PATTERN
Cast on a multiple of 4, +1.
Row 1 (RS): Color A, k2, *[k1, yo, k1] in next stitch, k3, repeat from * to last 3 sts, [k1, yo, k1] in next stitch, k2.
Row 2: Color B, p2, *sl 3 wyif, p3, repeat from * to last 5 sts, sl 3 wyif, p2.
Row 3: Color B, k1, *k2tog, sl 1 wyib, ssk, k1, repeat from *.
Row 4: Color A, p4. *sl 1 wyif, p3, repeat from * to last st, p1.
Row 5: Color A, k4, *[k1, yo, k1] in next stitch, k3, repeat from * to last st, k1.
Row 6: Color B, p4, *sl 3 wyif, p3, repeat from * to last st, p1.
Row 7: Color B, k3, *k2tog, sl 1 wyib, ssk, k1, repeat from * to last 2 sts, k2.
Row 8: Color A, p2, *sl 1 wyif, p3, repeat from * to last 3 sts, sl 1 wyif, p2.
Repeat rows 1-8.