Brain Teaser: Can You Tell What This Is A Picture Of?

Over the past week we have been dealing with numbers.  How many squares, how many triangles?  Well today I thought I'd do something a little different.  Can you tell what this is a picture of?

It is funny what your brain sees and doesn't see.  This looks like a picture of nothing, but take a closer look.  Do you see it now?

The answer is a cow.  Yes, it is a picture of a cow's face!