Although I don't have access to the machine, I created a digital version of ghost drawing machine to reveal the unknown beings occupied in the locations. As you walk around, the app is able to detect the ghost that occupies the area and reveal it through drawing.
This is achieved through connecting location data with Particle usisng IFTTT, and Particle sends the data to p5js.
Is this a good/useful/informative piece of content to include in the project? Have your say!