One of my favorite school projects was creating art using only CSS. I deviated only slightly away from the task by adding a few interactive elements using JQuery, however the art itself was created using entirely CSS. The concept was to create a splash page for a fictional home lighting company and to make it a little more fun and engaging than a simple online shop with photographs. The light switch on the logo at the top can be clicked to turn the background from day to night, and each light switch within the room itself can be clicked to switch lights on or off. The site can be entered using the button at the bottom of the page.

Live preview here.