LaTeX-examples/tikz/pi/pi.tex

\documentclass{standalone}
\usepackage{amssymb}
\usepackage{tikz}
\usepackage[utf8]{inputenc}
\usepackage{csvsimple}
\usepackage{xcolor}

\definecolor{c0}{HTML}{5A311D}
\definecolor{c1}{HTML}{E18B4E}
\definecolor{c2}{HTML}{4A1776}
\definecolor{c3}{HTML}{C966DA}
\definecolor{c4}{HTML}{04676C}
\definecolor{c5}{HTML}{0CE7E1}
\definecolor{c6}{HTML}{004692}
\definecolor{c7}{HTML}{0082FF}
\definecolor{c8}{HTML}{355128}
\definecolor{c9}{HTML}{DF1C24}

\begin{document}
\newcommand{\distance}{6}

\begin{tikzpicture}
    \foreach \a in {0,1,...,100}{
        \node[draw=none](\a) at (\a/100*360: \distance) {} ;
    }
    \csvreader[ head to column names]%
                {data.csv}{}{%
    \path (\x) edge [bend right, color=\color] (\y);
    }
\end{tikzpicture}
\end{document}