The devil becomes furious and leaves the woods after it has been several years since the devil has encountered someone.
The devil seeked out for a new spot to live in as nobody bothered to go into the woods anymore. But everywhere he went there were massive buildings everywhere. That wasn't his only problem, as the people where so into their technology nobody even noticed his very existence.
The devil needed to find a new way to grasp the attention of the people. He later gets the idea that people wouldn't be distracted at a grave yard when they've lost someone they loved.