anchor.diff:  included in the project
   https://github.com/brunchboy/afterglow[README].
   
  +[[overview]]
   == How Afterglow Works
   
   The fundamental task of Afterglow is to make light shows happen. It
  
positive.code: 
  ****
  
  == What is Afterglow?
  
  Afterglow is a lighting controller designed to support
  
negative.code: ifdef::env-github[:outfilesuffix: .adoc]
  
  To keep page sizes manageable, this information is split into several
  pages. This page provides an <<introduction,introduction>> and
  <<overview,overview>>, explains the <<the-embedded-web-interface,built
  in web interface>>, and links to other sections as needed. It is worth
  reading through this whole page once if you are new to Afterglow,
  because the orientation it provides will be helpful, and it ends with
  a <<getting-started,guide>> to help you get started on your way to
  creating your own light show. Once you know what you are looking for,
  you can also dive right into it by jumping to the page you want:
  
  ****
  
  