As you can see I've trace and stitched the corner heart motif four times at each mitered corner of the heart scroll borders, taking care to align the centers of the hearts with the mitered border seams.
Then I cut the purple fabric hearts out leaving a generous turn-under allowance. At this stage the heart is a solid shape.
Then I carefully cut the inside of each heart revealing the black background fabric.
The last step after reverse appliqueing the fabric in place is to sew a small yellow circle on each heart and a purple circle the same colour as the heart below complete the scroll heart boarder.