wall
wall

Solution

Imagine a wall in the daytime (photo 1).At nightfall on the wall and the text (photo2). Active poster, banner, which at nightfall indicates new text, which can be downloaded to your desktop, facebook, anywhere.
You can write on the wall (where it is no prohibited (in a dark alley)), paint that glows at night. This will attract attention, and especially youth.Seeing on the Internet looks like, download, they all want to know their rights, share with friends.