Slow zoom effect on background images

Not a fan of having this as a library with plenty of effects.
Using one always means loading all.

Also, no control. One is dependent on the predefined ones.
What I would like to see though is an option to build and manage CSS keyframe animations inside the builder.

It’s more efficient and the user has full control.
Like a codepen? Just build it yourself.
That wouldn’t be possible with predefined stuff.
I would love to have this as a feature, as I don’t plan to use custom stylesheets or custom code (with very little exceptions) at all.