\documentclass[]{article} \usepackage{pstricks} \usepackage{multido} \pagestyle{empty} \parindent=0pt \begin{document} \begin{center} \def\kreisFuellung#1{% \psset{unit=#1} \begin{pspicture}(-1,-1)(1,1) \multido{\nHue=0.01+0.01}{100}{% \xdefinecolor{MyColor}{hsb}{\nHue,1,1}% \pscircle[linewidth=0.01,linecolor=MyColor]{\nHue}% } \end{pspicture} } \begin{pspicture}(-2.5,-2.5)(2.5,2.5) \psset{unit=3}% \multido{\nHue=0.01+0.01}{100}{% \definecolor{MyColor}{hsb}{\nHue,1,1}% \pscircle[linewidth=0.01,linecolor=MyColor]{\nHue}% } \end{pspicture} \hspace{1em} \begin{pspicture}(-2.5,-2.5)(2.5,2.5) \psclip{\psframe(-2.5,-2.5)(2.5,2.5)} \rput(0,0){\kreisFuellung{3.5}} \endpsclip \end{pspicture} \end{center} \end{document}