A new fun particle effect: RGB sinks and springs. Motion of bitmap particles is determined by their RGB components
and their proximity to color 'sinks'. Each red, green and blue sink flies by itself or can be dragged by hand. It attracts
and repels particles based on their color components. Invisible 'springs' pull the particles back to their original
positions. You can experiment with 'sinks' and 'springs' settings and create a multitude of dynamic particle effects.