These illusions kill me

Today's optical illusion relies on basically the same concept as this optical illusion, and yet I was a sucker for it again. Somehow, this one almost seems even more implausible than the first one I posted.

Once again, I had to copy this whole thing into "Paint" and erase everything but the boxes to confirm that I'd been duped (just putting my finger across the page wasn't enough). Indeed, I had been duped. Again. Crazy stuff. One of these days I'll be able to explain these things to myself.