Spade Lace Pattern

Pattern
Cast on a multiple of 20 stitches, plus 1
Row 1 (RS): K4, *K2tog, Yo, K2, K2tog, Yo, K1, Yo, SSK, K2, Yo, SSK, K7; rep from * to  last 17 sts, K2tog, Yo, K2, K2tog, Yo, K1, Yo, SSK, K2, Yo, SSK, K4.
Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 34, and 36 (WS): Purl.
Row 3: K3, *K2tog, Yo, K2, K2tog, K1, Yo, K1, Yo, K1, SSK, K2, Yo, SSK, K5; rep from * to  last 18 sts, K2tog, Yo, K2, K2tog, K1, Yo, K1, Yo, K1, SSK, K2, Yo, SSK, K3.
Row 5: K2, *K2tog, Yo, K2, K2tog, K2, Yo, K1, Yo, K2, SSK, K2, Yo, SSK, K3; rep from * to  last 19 sts, K2tog, Yo, K2, K2tog, K2, Yo, K1, Yo, K2, SSK, K2, Yo, SSK, K2.
Row 7: K1, *K2tog, Yo, K2, K2tog, K3, Yo, K1, Yo, K3, SSK, K2, Yo, SSK, K1; rep from.
Row 9: SSK, Yo, *K2, K2tog, K4, Yo, K1, Yo, K4, SSK, K2, Yo, S2KP  Yo; rep from * to  last 19 sts, K2, K2tog, K4, Yo, K1, Yo, K4, SSK, K2, Yo, K2tog.
Row 11: K3, *K2tog, K2, K2tog, Yo, K1, Yo, K1, Yo, K1, Yo, SSK, K2, SSK, K5; rep from * to  last 18 sts, K2tog, K2, K2tog, Yo, K1, Yo, K1, Yo, K1, Yo, SSK, K2, SSK, K3.
Row 13: K2, *K2tog, K3, Yo, K2tog, K1, Yo, K1, Yo, K1, SSK, Yo, K3, SSK, K3; rep from * to  last 19 sts, K2tog, K3, Yo, K2tog, K1, Yo, K1, Yo, K1, SSK, Yo, K3, SSK, K2.
Row 15: K1, *K2tog, K3, Yo, K2tog, K2, Yo, K1, Yo, K2, SSK, Yo, K3, SSK, K1; rep from.
Row 17: SSK, K3, Yo, K2tog, K3, Yo, K1, *Yo, K3, SSK, Yo, K3, S2KP, K3, Yo, K2tog, K3, Yo, K1; rep from *, Yo, K3, SSK, Yo, K3, SSK
Row 19: K1, *Yo, SSK, K2, Yo, SSK, K7, K2tog, Yo, K2, K2tog, Yo, K1; rep from.
Row 21: K1, *Yo, K1, SSK, K2, Yo, SSK, K5, K2tog, Yo, K2, K2tog, K1, Yo, K1; rep from.
Row 23: K1, *Yo, K2, SSK, K2, Yo, SSK, K3, K2tog, Yo, K2, K2tog, K2, Yo, K1; rep from.
Row 25: K1, *Yo, K3, SSK, K2, Yo, SSK, K1, K2tog, Yo, K2, K2tog, K3, Yo, K1; rep from.
Row 27: K1, *Yo, K4, SSK, K2, Yo, S2KP, Yo, K2, K2tog, K4, Yo, K1; rep from.
Row 29: K1, *Yo, K1, Yo, SSK, K2, SSK, K5, K2tog, K2, K2tog, Yo, K1, Yo, K1; rep from.
Row 31: K1, *Yo, K1, SSK, Yo, K3, SSK, K3, K2tog, K3, Yo, K2tog, K1, Yo, K1; rep from.
Row 33: K1, *Yo, K2, SSK, Yo, K3, SSK, K1, K2tog, K3, Yo, K2tog, K2, Yo, K1; rep from.
Row 35: K1, *Yo, K3, SSK, Yo, K3, S2KP, K3, Yo, K2tog, K3, Yo, K1; rep from.
Rep rows 1-36.