No, it's an optical illusion - both shapes exist, but different groups of people tend to see one first instead of the other.
I see the rectangles initially, but after staring at the cross for a bit the circles appear:
Obligatory Garfunkel and Oates:
https://www.youtube.com/watch?v=EXPcBI4CJc8
No, it's an optical illusion - both shapes exist, but different groups of people tend to see one first instead of the other.
I see the rectangles initially, but after staring at the cross for a bit the circles appear: