anchor.diff:  sometimes links to related sections of the API documentation, and vice
   versa.
   
  -<<videos,Videos>>:: Show examples of Afterglow in action.
  +<<videos#videos,Videos>>:: Show examples of Afterglow in action.
   
   ****
   
  
positive.code: to your effects which change over time and space, enabling much more
  interesting and complex appearance and behavior.
  
  <<cues,Cues>>:: Provide a convenient way to organize and trigger
  effects. Allow you to build a user interface for your show, through a
  colorful cue grid in the web UI, on a supported grid controller, a
  basic MIDI controller, or a combination of several of these options.
  
  <<metronomes,Metronomes>>:: Keep track of musical time, in
  terms of beats, bars, and phrases, and can be
  <<mapping_sync#midi-mapping-and-beat-sync,synced>> to DJ equipment and
  software.
  
  <<oscillators,Oscillators>>:: Convert show timing
  information into waveforms that can drive your light show.
  
  <<fixture_definitions,Fixture Definitions>>:: Tell
  Afterglow how to work with different lighting hardware.
  
  <<show_space,Show Space>>:: Explores how to measure
  locations and orientations when hanging your lights so that Afterglow
  can properly calculate spatial and directional effects.
  
  <<color,Working with Color>>:: Introduces tools for
  expressing and manipulating color values when designing lighting
  effects.
  
  <<mapping_sync,Mapping and Sync>>:: Looks
  at options for using MIDI controllers to run your show, and
  synchronizing its metronome with DJ equipment.
  
  <<rendering_loop,The Rendering Loop>>:: Explains in
  detail how a frame of lighting control data is calculated and sent to
  the lights in the show. This is advanced, low-level information for
  people who are ready to create their own custom effect algorithms.
  
negative.code: 
  ****
  
   <<effects#effects,Effects>>::
  The building blocks of a dynamic light show, which have a
  <<effects#the-effect-lifecycle,lifecyle>> worth understanding, and a few
  <<effects#effect-examples,examples>> to get you started.
  