Created this tunnel effect in Javascript by drawing rectangles in a circle and then having the code be editable to see the results instantly (via IIFE).
In Visual Studio and Node/Typescript, this feature of seeing instant results at each code change is called "hot reload".
It would be nice to have hot reload in Apex and in other places too.
You can experiment with it at
Page available at my personal GitHub Page (temporarily removed here until resolving an issue with Google's Security)