\documentclass{standalone}
\usepackage{tikz}
\def\numcolors{10}
\def\numdots{200}
\newcommand{\tikzcircle}[2][red]{\tikz[baseline=-0.5ex]{\fill[{#1},radius=#2] (0,0) circle ;}\hspace{0pt}}%
\pgfmathparse{1/\numcolors}%
\definecolorseries{foo}{hsb}{step}{red!90!black}{\pgfmathresult,0,0}
\resetcolorseries[\numcolors]{foo}%
\newcounter{bar}
\foreach \x in {1,...,\numcolors}{
\setcounter{bar}{\x}
\newcounter{mycount\alph{bar}}
}
\begin{document}
\begin{tikzpicture}
\foreach \x in {1,...,\numdots}{%