How to make an iridescent SVG?

Question

Vector graphics

So it goes.
There is SVG, which should be animated on the page. More precisely, the background should be animated.
Animation salt - a glare runs along a gradient imitating gold. All.
I don't understand how to cut.
I read articles and did not find the exact solution to my problem - there they just don’t do anything with SVG, but they don’t do what I need. Particularly confusing is the connection of js libraries

Answer 1

I'm not doing svg, but it seems like the highlight is imitating just a white translucent stripe? For example:
jsfiddle.net/yFthP
And here are more examples for you: codinginparadise.org/projects/svgweb/samples/demo.html