Music wave bar: A construct of reactive color bars using the function of time to reinforce the process of interaction. One sees the lasting impression of their interaction with the piece as a function of time in two dimensions. MOUSEOVER the vertical range of each color bar to give it a sudden excitement of size. After color bars become excited, they gradually fall back to a null state. Each interaction event is recorded into the colorbar's history as a transparent copy of itself. John Maeda suggests that one appreciates cues from an already understood realm. They allow a synthetic world to immerse a user in natural ways..