Αντιγραφή του Trace of cat's eye

This animation shows the trace of the cat's eye being fixed on a wheel of a bicycle.
The applet was made by Andreas Lindner back in the middle of 2000's. Andreas is one of the most productive contributors of GeoGebra's. Currently he is a member of the GeoGebra Team and also a university college teacher at the Pädagogische Hochschule Oberösterreich.