\documentclass[pstricks]{standalone} \usepackage{pst-sphericaltrochoid} \begin{document} \multido{\i=0+10}{73}{% \begin{pspicture}(-5,-5)(5,5) \psSphericalTrochoid[Sphere,rG=0.5,rR=0.66667,tmax=\i,t=\i,Decran=2000,viewpoint=1000 10 -30 rtp2xyz,w=178] \end{pspicture}} \end{document}