@Subpa forgotten to give you the link : https://moiscript.weebly.com/biblio-elephant.html

else if you want make water colors : Expresii (not free) links under the youtube video!
or Verve (free) http://www.taron.de/forum/index.php
Vervette SandBox Online (free) http://www.taron.de/Vervette/sandbox/