Pearls of Sluze- MacTutor visualisation
I have taken an example from the MacTutor History of Mathematics, Famous curves index http://www-history.mcs.st-and.ac.uk/Curves/Pearls.html
and I have reprezented it with GeoGebra.
Please feel free to experiment with it!
Advances in Geogebra - CEEPUS activity, Miskolc, 2015, May 21st.