The Sacred Heart shows you a multi-dimensional fractal combination of the extended 13 circular Flower of Life and the ancient pagan symbol of the double equilateral triangles fire/water or masculine/feminine that is known today as the Star of David. When observed closely you see how each circle perfectly fits in the larger and smaller ones therewith creating perfectly balanced music strings and a very bright image. As some say, this allows for deep meditation.
This digital Sacred Heart is coloured black on a white background.
Video of creation of the Sacred Heart: https://www.youtube.com/watch?v=0UYumWvCaHI&index=1&list=PLQoWTVS1AsVQXOEAk6gUe15j9_-WL851p