Issue with “divider” images between blog posts on blog homepage

Hi – Basically I’ve set up a divider image to appear between each blog post on the homepage.

The way it works is that it adds a div at the end of each post preview, which has a simple background image in it.

What I’m wondering is how I can stop the divider appearing after the final post preview on the page?

The blog home is at https://blog.paulietheboss.com/ (dont click the links, the rest of the blog isn’t styled yet)

the red line appears under the top two posts as intended, but it also appears under the final post, which looks weird because the page ends there.

Any ideas?