anchor.diff:  :source-highlighter: pygments
   ----
   
  +=== Vertical slides
  +
   [listing]
   ....
   == Slide Six
  
positive.code: --
  ----
  
  In previous snippet we are creating a slide titled Slide One with bullets and another one titled Slide Two with centered text (reveal.js' default behavior) with https://github.com/hakimel/reveal.js#speaker-notes[speaker notes].
  
  ----
  
negative.code: Slide Three applies the attribute http://lab.hakim.se/reveal-js/#/14[data-background] to the `reveal.js` <section> tag.
  Anything accepted by CSS color formats works.
  Here is the https://github.com/hakimel/reveal.js#slide-backgrounds[upstream documentation].
  
  === Fragments
  
  ----
  == Slide Four
  