If you are on a computer, you need to install Python first.
Go to https://www.python.org/downloads/ and install the latest version.
Download the Bad Apple-fier ZIP file here:
https://file.garden/ZYwdaI8EZxs65XTA/badapplefier.zip
After downloading, extract the ZIP file. You should get a folder called badapplefier.
Open a terminal or command prompt inside the extracted folder and type:
python -m http.server
Then open your web browser and go to:
http://localhost:8000
The site should load normally.
If you are using a phone, install the app QuickEdit from Google Play.
Then download and extract the ZIP file on your phone. Open the file index.html using QuickEdit, and press the Run button at the corner.
Do not move files out of the folder. Everything needs to stay in the same place for the site to work correctly.