Eyelet Lace 87: Old Shale Variation

PATTERN
Cast on a multiple of 18 stitches
Row 1 (RS): Knit.
Row 2: Knit.
Row 3: Purl.
Row 4: Knit
Row 5: *[K2tog] 3 times, [yo, k1] 6 times, [k2tog] 3 times, repeat from *.
Row 6: Purl.
Row 7: *[K2tog] 3 times, [yo, k1] 6 times, [k2tog] 3 times, repeat from *.
Row 8: Purl.
Repeat rows 1-8.
Worked in the round, see Eyelet Lace 87 in the round