Interactive Voronoi Diagram
"A Voronoi diagram divides a plane into regions close to each of a given set of objects, or points on the plane. The regions consist of all points of the plane closer to the object than to any other.
Voronoi diagrams are used to solve 2D proximity problems (which object is closest to point x?). They are mainly used in science and technology, but also for visual art.
This is an interactive exploration of such a diagram."