Untitled 5 creates imagery that is painterly, organic, and evocative while still being completely algorithmic. To create this work, Utterback first develops sets of animated marks whose parameters and behaviors are controlled by people's movements. Then, out of a working 'palette' of these animated marks, she composes an overall composition. The composition balances responses whose logic is immediately clear, with responses that feel connected to viewer's movements, but whose logic remains complex and mysterious.

Integral to the piece are the animated marks' cumulative interaction with each other over time. As a person moves through the space, a colored line maps his or her trajectory across the projection. When a person leaves the installation, their trajectory line is transformed by an overlay of tiny organic marks. These marks can now be pushed from their location by other people's movement in the space. Displaced trajectory marks attempt to return to their original location, creating smears and streaks of color as they move. The resulting swaths of color occur at the intersections between current and previous motion in the space, elegantly connecting different moments of time.