Cast on 18 sts.
Commence from row 1 of chart

Rows 1-8 form pattern.
Repeat for desired length.

Note: For a more balanced lace cast on 17sts and omit the column of stitches marked in red.

Cast on 18sts.
Commence from row 1 of instructions:

1st row: Sl 1, K1, YO, K2tog, K4, YO, K2tog, K5, YO, K2tog, K1

2nd and every alt row: Sl 1, K1, YO, K2tog, K1, P9, K1, YO, K2tog, K1

3rd row: Sl 1, K1, YO, K2tog, K1, K2tog, YO, K3, YO, K2tog, K3, YO, K2tog, K1

5th row: Sl 1, K1, YO, K2tog, K2, YO, K2tog, K1, K2tog, YO, K4, YO, K2tog, K1

7th row: Sl 1, K1, YO, K2tog, K3, YO, Sl 1, K2tog, psso, YO, K5, YO, K2tog, K1

Note: For a more balanced lace cast on 17sts and omit the column of stitches marked in red on the chart.