A farmer in the country has a watermelon patch and upon inspection he discovers that some of the local kids have been helping themselves to a feast. The farmer thinks of ways to discourage this profit-eating situation.
So he puts up a sign that reads: “WARNING! ONE OF THESE WATERMELONS CONTAINS CYANIDE!”
He smiled smugly as he watched the kids run off the next night without eating any of his melons.
The farmer returns to the watermelon patch a week later to discover that none of the watermelons have been eaten, but finds another sign that reads: “NOW THERE ARE TWO!”
“A big part of letting go is recognizing when it is time to stay in a situation and when it is time to move on.” – Darren L. Johnson
So what do your see? Is the horizontal grey bar made of two colors? Check again by covering the background and just seeing the grey bar. The horizontal grey bar is of the same color throughout, you see the difference because of the difference in background.