Dynamic artworks are ones that can change with time or by using some observation of the surroundings. This is a novel feature of generative art. Paintings and drawings could not respond to the environment, nor could they change visually in any measurable way. A dynamic artwork is, at its minimum, one that can change with time. We might call this an animation, which literally means to bring life to something. Additionally, the advent of modern electronics technology makes it possible for an artwork to see and hear and for this to respond visually to colors, music, people, and motion in the volume that surrounds it. We won’t discuss the details of the electronic sensors that are needed for some of these works, only the visual response of the work.