This talk discusses our ongoing work to re-appropriate public spaces through digital interactive art. The Public and Performative Interaction Group recently organised a workshop that brought together artists, designers, and computing scientists for a two-day event. Our Goal: to create a working prototype of an interactive installation in just two days. Over the course of the workshop, we developed a concept, implemented the interface, and deployed this on the University of Glasgow Campus. Our untitled piece brought light, play, and interaction to a relatively derelict and empty space on campus, bringing new life and new ideas to the digital urban landscape.