1. FADING STARS - Stare at the moon long enough, and the stars should begin to fade away. How many can you get to disappear?
2. As the small circles intersect with the large ones, we seem to see the outlines of a growing and shrinking square. But there is no "square" -- your brain is trying to visualize in terms of solid shapes, and fills in the blanks.
3. These "fish" may appear to be wiggling, but the only thing changing in this animation is the color.
4. Do you see the rose spots? Well, if you look at the cross, soon enough there’ll only be one green
spot running around, other spots will disappear.
5. Here's a simple one. Are these two rows of squares perfectly parallel?
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