This shader is converted from Heartfelt(https://www.shadertoy.com/view/ltffzl) - by Martijn Steinrucken aka BigWings - 2017 (countfrolic@gmail.com). License Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License.
Video on YouTube(https://youtu.be/dQSLjsDAzw0)