What could this be? A futuristic mood ring? An artist's rendering of a wormhole? Nah. Those are too abstract. This is based on something all too real, and totally inescapable.
What you're looking at is a project from Fernanda Viégas and Martin Wattenberg called Flickr Flow. It's a look at how the colors in Flickr images of the Boston Common change with every season:
Our software calculated the relative proportions of different colors seen in photos taken in each month of the year, and plotted them on a wheel... Summer is at the top, with time proceeding clockwise.
The ebb and flow of time, the passage of seasons, in a neverending circle. Poetry through technology, and all that. Here's how the seasons break down: