A Horizontal Rule or line as it's more commonly called can be used to separate your website into different sections.
Above is an example of a line, it's very plain and boring, but many things can be done to the line to make them look a little bit better.
|COLOR||This will change the color of your line (done with a hex code).|
|WIDTH||This will change how far across the screen the line will go. It can be defined by pixels or by percentage of the window. If you define it with percentage, just place the percent symbol after the number.|
|SIZE||This will change how thick the line is, and can only be defined in pixels.|
Here is an example of what you can do: