Christmas greetings! Take four shiny Christmas baubles and stack them in a tetrahedron arrangement. Look closely at the reflections where three balls touch, with a fourth ball behind the gap. Be amazed at the Wada Basin fractal patterns.

Sharing my contagious delight in phenomena...

Christmas greetings! Take four shiny Christmas baubles and stack them in a tetrahedron arrangement. Look closely at the reflections where three balls touch, with a fourth ball behind the gap. Be amazed at the Wada Basin fractal patterns.