NB Rows 7/13 worked with a needle twice the circumference of the needle used for the other rows.
Optional ribbing set-up:
CO multiple of 15+1.
Rows 1-3: P1 (k2, p1)
Rows 2-4: K1 (p2, k1)
Row 5: P1 (k4, ssk, k2, k2tog, k4, p1)
For lace pattern, work rows 1-7 once. Repeat rows 2-7.
Shown with a cast-on count of 27 stitches.