These three pieces introduce different types of boundary-based numbers, using text and diagrams rather than animation.

The James Imaginary shows that the imaginary number i can be decomposed (!) into a new imaginary with a phase of two rather than four.

I compiled a rather thorough monograph on boundary number forms. Each chapter (except the introduction) is stand-alone. The James imaginary is treated extensively; James numbers follow Jeff James Masters thesis. Bricken graph numbers replicates the first piece above.