Scintillating grid illusion

[mkirkpatrick]

Here’s one more illusion. Let's call it zeroca's illusion. Both regular squares seem distorted.

Zeroca,you have excelled your self
yet again,your animation is a marvel.

kind regards michael.

[zeroca]

Thank you Michael, you’re very kind person and that’s the reason of your respect by everybody.
Is it illusion below, or not, I can’t say definitely, but believe me the regular triangle is a red figure behind the grill. (second image without a grill):