A well-known Niebling pattern (Frosted Ferns) which is in the public domain.
A separate Stitch Map here shows as much as possible from the beginning.
Shown with a cast-on count of 40 stitches.
1 2 3 4 5 Horizontal repeats
1 2 3 4 5 Vertical repeats
Swatch photo uploaded by chrisfourfalcon