This one will take a ready-made google animation set of images, and create an embed code for it.
instructions at: http://suewaters.com/2018/07/11/embed-google-photos-album-into-a-website/
but it's pretty straightforward, here is the site with the tool:
https://www.publicalbum.org/blog/embedding-google-photos-albums
That has a tool to convert the album url (from the share button) into a script and html. Insert the script part into the head and html into the body.
The script is attached below in case the site disappears or drops it.
But you can make an animation and then paste the link of the animation into the box instead of the album.