https://www.youtube.com/watch?v=i2_vlXi6TzM&feature=youtu.be I
  REALLY WANT TO LEARN DRAKON VISUAL PROGRAMMING, so I made this.
  -Ken [it generates Lua, Java, Erlang, Tcl, C, C++, Python code
  and changes how you think even if you don't use it for
  code-generation but for flow-charting] Part 1, 2, 3 of Drakon
  Visual Language Tutorial - Slideshow set to Royalty-Free Kevin
  MacCleod music perfectly timed for the slides. 160 bpm / 80 bpm,
  6 seconds per slide, by Kenneth Udut because I want to learn it
  and I find slideshows boring but music interesting and
  synchronized music/video even more interesting. See below for
  playlist. Upcoming songs also inserted into the slides. "DRAKON
  Visual Language DRAKON is a visual language for specifications
  from the Russian space program. DRAKON is used for capturing
  requirements and building software that controls spacecraft. The
  rules of DRAKON are optimized to ensure easy understanding by
  human beings. DRAKON is gaining popularity in other areas beyond
  software, such as medical textbooks and law. Its purpose is to
  represent any knowledge that explains how to accomplish a goal."
  - via http://drakon-editor.sourceforge.net/language.html
  Slideshow by http://www.slideshare.net/stepan_mitkin PDF to PNG
  converted by http://pdf2png.com - thanx guys! THE MUSIC: 160 bpm
  - perfect timing for 6 second slides. Pinball Spring 160
  Triumphant and exuberant, this arcade groove is bright and
  perfect for retro games or humorous video content. Super fast
  J-Pop feel version. Bouncy, Bright, Driving Mining by Moonlight
  Light, upbeat, cool - useful for video game montages, and
  telephone on-hold music... and... nearly anything where you need
  something interesting - but not TOO interesting. Ghostpocalypse
  Action, Epic, Intense, Unnervin Fun in a Bottle Peppy piano
  piece that has a tinge of darkness, but is always happy! 80 bpm
  - perfect timing for 6 second slides Moorland somber, epic,
  celtic drone sound.