How to make a shaking button

Here is a shaking button.
I want to do that as well on my page, but I have no clue how to do that.

Can anyone help me?

Here is my public share link: LINK
(how to access public share link)

This is an older site. You’ll have to go to Interactions panel and then enable the “Legacy Interactions” at the bottom of the panel to see how they built it.