As an engineer, I believe that you are trying to solve a non-problem. It may be a disease of the young that they cannot cut the umbilical (in the current discussion, an electronic link) to their cohorts. Failure to use/desire/own Smartphones is not viewed, by me, as a disease of ...
solves the problem. If you want to find the source code to an arcane tool like “banner”, just type it into a GitHub search of the organization. If there are too many false hits, as is the case for a common word like banner, try searching on something unique like a term from the ...