If you look using your browser's dev tools at the image you'll see it's made up of SVG components.
There are several ways of animating
- using CSS
- JavaScript
- and/or within SVG itself.
Certainly you need to learn the basics of CSS animation anyway, but I don’t think that’s what’s been used here.
For SVGs google something ‘like how to animate SVGs’. Animating along paths is particularly useful and I suspect that is what is being done here.
There's lots of tools to help, but SO doesn't like recommendations on this sort of thing.
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