This is one of the simplest tutorials I will ever do. Only one step! A divider line will help differentiate between 2 blog posts.
Step 1: Add CSS Code
First you need to click the "Edit HTML/CSS" button under the themes tab. The you scroll around the side bar until you find the option named: "_blog.less". After you click it, then you paste the following code once you scroll all the way to the bottom:
border-bottom: 2px solid #e9e9e9; /* Changes the line's styling */
margin-bottom: 2em; /* Change the space above the line */
margin-bottom:0; /* Deactivates the line on the last blog post */
border-bottom:0; /* Deactivates the spacing on the last blog post */
You Are Done! Enjoy Your New Blog Post Divider!