This is an example of using the Symbulation software. The web version is run first and an example of running the command-line version is second.
You can edit and recompile the command line version in Replit, however you can't edit the web version in the browser currently. Instead, you should download locally and work there. For more information, check out the documentation: https://symbulation.readthedocs.io/en/latest/QuickStartGuides/1-GettingRunning.html
I encourage you to fork this Replit and play around with editing the code!