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Spectrum Walker

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phil
locke
Random walker zips around a grid. First time square is touched, it changes black to red (using HSB color). Subsequent touches increment Hue until it is red (255) again. After that, it decrements saturation until square is white. After that, it decrements brightness until square is black again. Mouse click repositions the walker. Hotkeys (click sketch to activate): (1-6) and (0) change square size. (7-9) change HSB increment/decrement rate. (-) (=) increment/decrement walker step size. ([) (]) change walker black/white. For best performance run in Processing, esp. with small squares.
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