This program is an "Arduino+NeoPixel Emulator".

It allows developing and testing simple Arduino sketches that produce
NeoPixel LED string displays and effects, running them on an ordinary
PC and showing them on the computer screen using SDL (Simple
DirectMedia Layer).

The Fake_NeoPixel class is a stripped-down copy of Adafruit_NeoPixel for
Arduino modified to use SDL2 as the rendering backend.  License: GPLv3
https://github.com/adafruit/Adafruit_NeoPixel
Some inspiration was taken from SDL tutorials by Lazy Foo' Productions.
http://lazyfoo.net/tutorials/SDL/index.php#Hello%20SDL

To compile and run on Ubuntu/Debian, first, install SDL2 and g++:
    sudo apt-get install libsdl2-dev g++
To compile:
    make
To run it:
    ./lightstring