Instantiations #7 & #8 (The Animations)
In addition to the superimposition of images, there is a time-based strategy of accumulation of variation in sequence. These two pieces use this technique. They also embed the curve within other systematic relations.
In #7, the harmonograph curve is animated by tweening. The color of the both curve and its background are also variable but they maintain an exact mathematical relationship which determines the background as the opposite color of the forground.
In #8, the curves accumulate rather than replace one another. The color system is based on programatic approximation of plaid.