Stamp or draw a heart, and fill it up with distress crackle paint, doesn't really matter which color you use, as you are going to cover it entirely with Pan Pastel.
I had a happy accident here, as I was too impatient to let it dry all by itself, and it formed a bubble underneath the top layer of the crackle paint. It fell off in the next step.
Rub some Pan Pastel in the cracks with your finger, and color the crackle paint too this way (or leave some areas the original color - your choice!)
Fixate the pastel.
Finish it off as shown, some accents of color and script in the background.
Panpastel Bright Yellow Green 680.5
Panpastel Red Iron Oxide 380.5
(Script stamp is from Art Journey)