Ch 64 foundation double crochet (or ch65 / double crochet 64)

Treble, (chain 2 and miss two, treble 2) until end - should have 17 columns incl two at the ends

Filet as diagram

Treble, (chain 2 and miss two, treble 2) until end - should have 17 columns incl two at the ends

Heart edging - 2 rows:

Treble 5 into stitch, (ch2, miss 6, treble 5 into 7th stitch) - repeat

Ch2, treble, ch2, slip stitch into centre, slip stitch into next stitch, ch2, treble, ch 2, slip stitch until next heart, repeat

A draft for the heart edging but the spacing is slightly wrong