Quilting is the stitch used to hold layers together. It creates the texture that will make your heart stand out.
Use 2 strands of embroidery thread.
Thread your needle & wrap thread around the tip 3 times. Hold in place with your thumb and pull needle so it creates a quilters' knot.
Bring needle to the front at point A
Insert needle at point B and come up at point C. This is a quilting stitch.
Continue all the way around your heart shape. Aim to keep your stitch length consistent.