Ulam Spiral appears when you draw spiral colouring each pixel along the discrete spiral curve by white if the number is prime and black if it isn't. Here I modify the spiral algorithm and make it animated.. Wold first?
youtube.com/shorts/qbewbkOJC…
Enjoy!
Szymon Kaczmarczyk, Filip Koza, Damian Śnieżek, Maciej Matyka, Cauliflower shapes of bacterial clusters in the off-lattice Eden model for bacterial growth in a Petri dish
Phys. Rev. E. 111, 14406 (2025)
journals.aps.org/pre/abstrac…