\documentclass[pstricks]{standalone}

\usepackage{pst-fourbarlinkage,multido}


\begin{document}
\multido{\i=0+10}{37}{
\begin{pspicture}(-5,-8)(10,9) % class 2
\psFourBarLinkage[unit=2,barlengths=7.5 16 15 10,crossed=false,N=\i,centrodes,fixedcentrodes,connectedpoints,dmax=5] % classe 2
\end{pspicture}}
\end{document}