"Gradients Along SVG Path" by Ksenia Kondrashova
https://codepen.io/ksenia-k/pen/mdzYKmm
(You can't set a gradient-along-a-<path> in SVG really, so instead GSAP is cleverly used here to set <circle>s along a path which can simulate that gradient effect, and much more!)

https://twitter.com/CodePen/status/1744547847754649823