Old Shale Lace Knitting

Pattern
Cast on a multiple of 17 stitches.
Row 1 (RS): Knit.
Row 2 (WS): Purl.
Row 3: *[K2tog] 3 times, [Yo, K1] 5 times, Yo, [K2tog] 3 times; rep from *.
Row 4: Knit.
Row 5: Purl.
Row 6: Knit.
Row 7: *[P2tog] 3 times, [Yo, P1] 5 times, yo, [P2tog] 3 times; rep from *.
Row 8: Purl.
Repeat rows 1-8.