\documentclass[pstricks]{standalone} \usepackage{pst-sphericaltrochoid} \begin{document} \multido{\i=0+10}{73}{% \begin{pspicture}(-4,-4)(4,4.5) \psSphericalTrochoid[Sphere,rG=0.5,rR=0.22222,tmax=\i,t=\i,Decran=3000,w=10,viewpoint=1000 10 30 rtp2xyz] \end{pspicture}} \end{document}