This is unexpected Voronoi diagram (see the full storythe full story). By zooming in and out of the following pictures, such a picture can be seen on the screen for a short time (less than 1 second).
It illustrates not the Voronoi diagram but a "brittle view of the internal logic of the X86 FPU". The same page contains some examples which are almost the same as pictures from the answer of joro but much more funny:
Such pictures were discussed in Russian "Kvant" magazine.



