Include a CSS style parameter in your HR tag to modify the default color to black. Use an HTML or text editor to open the HTML page in which you want the line to appear. Type the following code ...

As the available computing power from affordable microcontrollers continues to increase, there is an inevitable blurring of the line between ... a proof-of-concept HTML + CSS renderer over h2 ...

HTML doesn't offer as clean a solution for vertical lines as it does for horizontal lines -- a vertical equivalent to the Set your image up within your text and add a "style" attribute tag.

jsFiddle is the perfect solution; it provides a custom environment (based on user selections) to test (or fiddle with) your JavaScript, HTML, and CSS code ... page includes a line of buttons ...