This web application is made to better understand cycloids defined by C.A. Petri. They were defined by C.A. Petri in "Nets, Time and Space", Theoretical Computer Science 153 (1996), p. 3-48.
The App is published here: http://cycloids.adventas.de.
The App uses the CANGO Canvas Graphics Library, which can be found here: http://www.arc.id.au/CanvasGraphics.html.