Stare at the dark dot in the center for 10 seconds...
Now move your head forward and backward.
As your head moves closer to your monitor
and then back away from your monitor, the circles
will appear to be spinning.
- - - But are they really spinning? Absolutely NOT
Is the window on the right side or the left side of this building?
Are the circles moving?
Actually, they aren't!
Are there gray squares on the black lines?
Are the blue squares straight or crooked?
I will add more next time. But for now, tootles!
