public static IZ1BrushSequence DualBrushes(Color positiveColor, Color negativeColor, int steps) { return new Z1BrushSequence( positiveBrushes: positiveColor.FadingSpread(steps + 1).ToBrushes(), negativeBrushes: negativeColor.FadingSpread(steps + 1).ToBrushes() ); }