Need help identifying the right documentation diagram

This is a newb question and I appreciate any help you can provide. I'm not a software developer.

My project is functional programming and very linear in how it executes. Code flow is basically a main script that calls on a series of config and resource files and then calls on a bunch of functions embedded in other source code files. There are several paths in how the code executes depending on what's in the config. There's no user interaction whatsoever.

I need a basic diagram/document that best captures what each script and resource file does, as well as the general path flow of the execution.

Not looking to become an expert on this subject, just looking for a "go look up XXXX" type answer and I'll take it from there.

Thoughts?