Colorful drawing of the spiral of roots using TikZ

gistfile1.tex

% The Spiral of Roots (https://gist.github.com/drorata/8709182)
%
% Inspired by Felix Lindemann (http://www.texample.net/tikz/examples/rooty-helix/)
%
% Author: Dror Atariah, drorata@gmail.com

\documentclass[border=4pt]{standalone}

\usepackage{tikz}
\usetikzlibrary{calc}

\begin{document}
\xdefinecolor{darkgreen}{RGB}{175, 193, 36}
\def\couleur{darkgreen}
\newcounter{prev}
\begin{tikzpicture}
  \def\numTs{120}
  \def\angTol{0} % Allows a randomized spiral
  \coordinate (o) at (0,0);
  \coordinate (p0) at (0:1);

  \foreach \i in {1,...,\numTs}
  { % Compute the vertices of the spiral
    \pgfmathsetcounter{prev}{\i-1}
    \pgfmathparse{rand}
    \let\rand\pgfmathresult
    % Randomizes the angle to be used with at most +/-\anglTol
    \pgfmathsetmacro{\angle}{270+(1-\rand)*(-\angTol)+\angTol*\rand}
    \coordinate (p\i) at ($(p\theprev)!1cm!\angle:(o)$);
  }

  \foreach[count=\j from 1] \i in {\numTs,...,1}
  { % Draw the triangles and color them in a REVERSE order.
    \pgfmathsetcounter{prev}{\i-1}
    \pgfmathparse{1*\j}
    \filldraw[draw=gray,fill=\couleur!\pgfmathresult] (o) -- (p\theprev) -- (p\i) -- cycle;
    \fill (p\i) circle (2pt);
  }
  \fill (p0) circle (2pt);
  \fill (o) circle (2pt);
\end{tikzpicture}
\end{document}