A one-pixel background image can be a pretty versatile thing. With repeat-x it can be a horizontal line, repeat-y makes a vertical line, and repeat makes it a fill color. Just as a little fun proof of concept, we can use that to create a depth-chart looking unordered list: The HTML is nothing fancy, just a nested unordered list like any other: <ul id="project-list"> <li><a href="#">Civil Engineeri