How to implement infinite repetition of Canvas, SVG animation?

Question

Canvas

There was a need to implement just such an animation: a curved line (like a route on the map), its smooth appearance from point A and moving (while maintaining its visibility) to point B, C, etc., then it disappears.
An example can be found here https ://tympanus.net/Development/StorytellingMap/
Only in this example the line moves when scrolling, but I need it to be an endless animation, it can be random, can someone come across a similar one?