I keep seeing people repost this annoying little image to their Facebook pages with a question that asks "How many squares do you see?":

First of all, I find these kinds of brain teasers annoying, and the fact that this image shows up every few months or so is only adding to my pre-existing dislike for this particular distraction. What's more annoying, however, is watching the debate that inevitably unfolds with regard to how many squares are displayed.
With that in mind, I will ruin this for future generations by stating that it contains 40 squares, and I created the following animation which shows where that number comes from:

With that in mind, please make the madness stop and just say "no" to posting useless brain teasers.