The trick
Each face is a Sierpinski triangle: join the midpoints, keep the three corners and repeat. Then the same face is copied three times, each turned 120° from the next around the vertical axis.
Sierpinski 3D
Sierpinski pyramid: the same fractal as the triangle, now on three faces spinning in WebGL. Raise the level and watch them split.
The math
Each level triples the triangles on each face (3n). With three faces, level 3 draws 81 triangles and level 6 is already 2,187.
Made with
Plain WebGL with its own shaders and gl-matrix: recursion builds the vertices, each triangle gets a random color from the palette, and it rotates a bit every frame. One full turn every 10 seconds.