Estonian Leaf Lace Pattern

Pattern
Cast on a multiple of 10 stitches, plus 3.
Multiple of 10 stitches, plus 3
Row 1 (RS): K1, Kfb, K4, *K2tog, K4, Yo, K4; rep from * to last 7 sts, K2tog, K5.
Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20: Purl.
Row 3: K2, *Yo, K3, S2KP, K3, Yo, K1; rep from * to last st, K1.
Row 5: K3, *Yo, K2, S2KP, K2, Yo, K3; rep from *.
Row 7: K4, *Yo, K1, S2KP, K1, Yo, K5; rep from * to last 9 sts, Yo, K1, S2KP, K1, Yo, K4.
Row 9: K5, *Yo, S2KP, Yo, K7; rep from * to last 8 sts, Yo, S2KP, Yo, K5.
Row 11: K6, *Yo, K4, K2tog, K4; rep from * to last 7 sts, Yo, K4, K2tog, K1.
Row 13: K1, K2tog, K3, Yo, K1, *Yo, K3, S2KP, K3, Yo, K1; rep from * to last 6 sts, Yo, K3, K2tog, K1.
Row 15: K1, K2tog, K2, Yo, K3, *Yo, K2, S2KP, K2, Yo, K3; rep from * to last 5 sts, Yo, K2, K2tog, K1.
Row 17: K1, K2tog, K1, Yo, K5, *Yo, K1, S2KP, K1, Yo, K5; rep from * to last 4 sts, Yo, K1, K2tog, K1.
Row 19: K1, K2tog, Yo, K7, *Yo, S2KP, Yo, K7; rep from * to last 3 sts, Yo, K2tog, K1.
Rep rows 1-20.