I find it very pleasant when a song (mostly progressive rock songs, in my case) ends by looping through a somewhat repeating theme before fading out.
Good examples would be:
- Gentle Giant - Three Friends (from "Three Friends" album)
- Dream Theater - Scarred (from "Awake" album)
(I am sure there are dozens of other examples but these two are very representative).
The question is: regarding compositional structure, is there a specific name to describe that?