Patient Curvy walkerMethod 'D' involves algorithms that treat the paper as space and ink as object. "Line" remains open to interpretation. Method 'D' involves algorithms that treat the paper as space and ink as object. "Line" remains open to interpretation. In series D-002, marks are made by a particle "walking" in a random but generally curving path within a boundary on the page. The invisible particle leaves a dashed trail, which it is never allowed to make contact with. If the particle is nearing collision with its trail, its angular acceleration increases–it steers out of the way. The gaps between the dashes are openings, where the particle may move through. Over the course of the drawing, the particle speed decreases, (causing the curves to be tighter and smoother) the proportion of dash to gap decreases. Run 002 uses an almost new black pen within a square boundary. Relative to run 001, the rate of speed decrease is lower and the path longer.