\documentclass[pstricks]{standalone}

\usepackage{pst-fourbarlinkage,multido}


\begin{document}
\multido{\i=0+10}{37}{
\begin{pspicture}(-11,-8)(10,9) % class 3
\psFourBarLinkage[unit=1.5,barlengths=10 10 14 14,N=\i,connectedpoints,centrodes,fixedcentrodes,dmax=5] % classe 16
\end{pspicture}}
\end{document}



