Running Coder files on Pavlovia

URL of experiment: https://run.pavlovia.org/mes42/individual-differences-in-subjective-preferences

Description of the problem:
I tried to upload a .py file to run on Pavlovia. From what I’m reading that is not possible to do because I don’t have the necessary html and JS files. I started creating my experiment with builder but had to switch to coder as there are some things only coder can do. Therefore I do not believe I can recreate this experiment in builder using snippets of code.

Is it impossible for me to get this experiment on Pavlovia now? I have read to documentation of Manual coding of PsychoJS studies and I could not find clear guidance on how to create the necessary scripts (mostly because the information is over my head). I was hoping for some suggestions moving forward, thank you.