This is the illusion which can cause harm to your eyes if you look continuously .Try looking at it for 45 sec and then see the wall you will see some radiations of this kind coming out of your wall too
This is actually not true in all cases.Just because some people see what they perceive,it has been stated here

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(31 votes, average: 3.58 out of 5)
its good it changes its couler
that is eye!! because clear on blue with red that this eye
this may look like my favorite but i like it
Lol, it works. Sugoii..
it really does
Yes, I can see it on the walls,
That you might see a larger square and a circle that the colour is a rainbow that red is inner while purple is outer on the wall.