This project has been on my mind since a long time. My intention is to create an interactive installation. This basic, screen based prototype of it is meant to become a projection mapping that reacts to people passing by. For now, the visualisation reacts to the position of the mouse instead of the movement of a person. The idea is to let people go crazy and creative with this visualisation. Through the shadow that remains behind, each person will be able to draw their own "skyline" and make it even more interesting through collaboration with other people. Using different colors and styles the skylines will be personalized for each person. Through the personalized lines/shadows that people leave behind, we will not only create Art in realtime. We will be able see the history of what other people did before. That will be a way of collaboration across time.