Different box, based on post id/slug

Hi guys,

Thanks for this lovely plugin!

Just getting my feet wet here, so I have a question:

Is it possible to show a different box, based on post id?

Here’s what I’m after:

I’d like to show BOX A for the majority of my posts. However, I’d like to show BOX B for posts with id’s 21 & 34. BOX A should not display on posts with those id’s.

If I create BOX A and make it appear on all posts, then create BOX B and make it appear on id’s 21 & 34, BOTH of the boxes pop-up when I scroll down.

I’m probably missing something obvious here, so I apologize. It’s been a long day at work! 🙂

https://wordpress.org/plugins/scroll-triggered-boxes/