A pretty lace with rows of vaulted arches.

Abbreviations:

k= knit
p= purl
yo = yarn over
k2tog = knit two stitches together
ssk = slip, slip, knit slipped stitches tog. A decrease

Cast on multiples of 8

Row 1: p1, k1, p4, k1, p1

Row 2: k1, p1, k4, p1, k1

Row 3: p1, k1, p4, k1, p1

Row 4: k1, p1, k4, p1, k1

Row 5: p1, yo, ssk, p2, k2tog, yo, p1

Row 6: k1, p2, k2, p2, k1

Row 7:  p2, yo, ssk, k2tog, yo, p2

Row 8: k2, p4, k2

8 rows make up the pattern.