Eyelet Lace 88: Old Shale

PATTERN
Cast on a multiple of 18 stitches.
Row 1 (RS): Color A, knit.
Row 2: Color A, purl.
Row 3: Color A, *[k2tog] 3 times, [yo, k1] 6 times, [k2tog] 3 times, repeat from *.
Row 4: Color A, knit.
Row 5: Color B, knit.
Row 6: Color B, purl.
Row 7: Color B, *[k2tog] 3 times, [yo, k1] 6 times, [k2tog] 3 times, repeat from *.
Row 8: Color B, knit.
Repeat rows 1-8.
Worked in the round, see Eyelet Lace 88 in the round