Author, edition, design and applets

Software credits

Applets for letters F, J, K and S were created using the following JavaScript libraries:
p5.js -  p5.EasyCam -  dat.GUI 

The source code of these applets is available at GitHub and is licensed under the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.

Applets for the rest of the letters were created with
GeoGebra (


The Koch snowflake applet is based upon the work of Mitsuru Koyama.
Some of the GeoGebra applets are based upon the work of the following GeoGebra users:

A - Malin Christersson
B - C. Wolfseher
D, G - Vincent Pantaloni
I, P - Steve Phelps
L - Walerij Koschkin
O - Jerzy Mil
R - Juan Vicente Sánchez
T - sonom
W - ukukuku

Finally, I’d like to thank my family: my partner, Kelly Matthews, who supported this project, and my daughters, Alex Iktan and Codi Quetzal, who inspired me and helped me to make this interactive website.


Please report any mistakes in the website or bugs in the source with a GitHub issue or contact me.