Completed
I have constructed an Harmonograph ( https://en.wikipedia.org/wi... ) that is maximally configurable.
It has 20 Parameters => Sliders to play with!
I designed nearly all physical behaviour in the model - all that can be set in broad rages.
The mechanical model, the movement of the pendulums and drawing with / without paper movement
can be shown/hidden. (With paper movement it is often too chaotic)
Geogebra and my computer has to work up a sweat - but delivers almost instantaneous pictures(!!!)
If you like this Program / "Machine", please answer.
Also additional ideas / improvements are very much appreciated.
I like this idea 
Thank You, Alex.
Very pleasant design.
10'x (y)
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