implemented with Delphi Alexandria (c)2022 by Paul TOTH
based on https://www.giannisarcone.com/Muller_lyer_illusion.html
Copyright © G. Sarcone
Pointed out by Albert Moukheiber on Facebook
tothpaul/Firemonkey.Muller-Lyer
Firemonkey implementation of dynamics Muller-Lyer illusions
PascalGPL-3.0