Julia Sets and Orbits of Complex Iterations - Geogebra (Mandelbrot Build Part 1)

This is the 'how did' video(s) for the crucial files I used in the @numberphile Mandelbrot video here: https://youtu.be/FFftmWSzgmk

Also mentioned by Grant Sanderson @3blue1brown in his excellent "Beyond the Mandelbrot Set" here: https://youtu.be/LqbZpur38nw

Part 1 here gets us up to the Julia Sets.
Part 2 gets us to the Mandelbrot orbits - and the set itself https://youtu.be/3BXoNOahFJk

There's a Geogebra file here: https://www.geogebra.org/m/uf4AMrQH