\documentclass[a4paper]{article}

\usepackage{fancybox}
\usepackage{tikz}
\usepackage{forloop}

\newsavebox{\mybox}
\newcounter{counter}
\begin{document}

\savebox{\mybox}
{
    \begin{tikzpicture}
    \foreach \x in {1,1.001,1.002,...,2}
    {
        \draw (0+\x,0) circle (0.4cm);
    }
    \end{tikzpicture}
}

\forloop{counter}{0}{\value{counter} < 50}
{
    \usebox{\mybox}\\
}

\end{document}
