How to run more than one file on Heroku in Procfile?

Question

Python

I have a bot, and for it to work, you need to run 3 files. But how to host them on Heroku, because one file is written in Procfile?

tried this:
worker: python yellow-cube-bot_vkCoin.py
worker: python timer.py
worker: python longpool.py
but NOTHING