Walking on a Rainy Day V

OK, so this is astounding!  Right after I photographed Scudder's Pond for yesterday's blog, I crossed the street and happened to look down and see this oil slick on a shallow puddle in the road.  I have no idea what made the oil slick circle around like this, or why the different colors in the slick.  As I photographed it, it continued to rotate, clockwise, changing its pattern.  I just thought this was an astounding thing going on with the water and oil, and the wind!