Many possibilities

How does it work?

Site Stylus is based on the programming languages "Javascript" and "CSS". This can be easily loaded from your site using two lines of code that you are assigned.
You paste the two lines on your site where you normally paste similar code such as Google Analytics.

The code is completely secure and can be easily removed at any time when you do not feel like keeping it anymore.
The design and content that you create on Site Stylus will only be visible on your site as long as you keep the code. The changes are therefore not permanent and you can very easily remove them whenever you want and restore your site.