Based on Basic Lace edging. Modified to be based on garter stitch rather than stockinette, and to use sl1 wyif in its chain selvedge rather than sl wyib.
sl1 wyif
sl wyib
Shown with a cast-on count of 6 stitches.
1 2 3 4 5 Horizontal repeats
1 2 3 4 5 Vertical repeats
Swatch photo uploaded by jcbriar