President Obama’s in town, and in a spirit of hospitality I won’t have anything to say about last night’s speech. (Anyway, everybody’s already said it, for example here and here.)
Instead, then: a grab from the Shameless Filler bag. Tonight it’s one of the damnedest eyetwisters I’ve ever seen.
The squares in the image below are arranged in four concentric circles. (If you don’t believe me, trace them with your mouse!)