Thanks for explaining. I thought it was a puzzle you'd made for us 
I was expecting to rotate and superimpose to reveal a picture/icon of some kind, but that didn't work.
Then I noticed the two lines of alternating light and dark pixels between the corners to the squares, and how in general the dark pixels tend to form longer unbroken lines than the light coloured pixels, but I couldn't work out what it all meant.

I was expecting to rotate and superimpose to reveal a picture/icon of some kind, but that didn't work.
Then I noticed the two lines of alternating light and dark pixels between the corners to the squares, and how in general the dark pixels tend to form longer unbroken lines than the light coloured pixels, but I couldn't work out what it all meant.