Perspective

I opened my browser to Google’s home page, and my eyes rested upon the menu icon. And I contemplated it.

What do you see? How would you describe it? Some would say it’s a group of dots. But is it?

Let’s make a simple change. Let’s change the background color that borders the group of dots to the color of the dots. Then here is what we have:

Now it looks like tic-tac-toe lines. Let’s reverse the colors: gray to white, white to gray. Then we have:

I started with dots and ended with lines, without drawing any lines or erasing any dots. So is the image made of dots or lines? Or is it both, or neither, and is what you see dependant on your perspective?