This free program is like a physics sandbox for juggling, you can create wild patterns and watch them play out perfectly

https://jugglinglab.org/ Juggling Lab is a software application that helps people learn and create new juggling patterns by animating them. The site provides details on the software's features, including support for various siteswap patterns, bounced throws, and a graphical pattern editor. It also offers instructions for downloading and installing the application on different operating systems and provides documentation on topics like siteswap notation and using the visual editor.