Flag construction in a square (Geogebra4.25 in html5)

 An another  long scripting for interactivity with the mouse

Click on picture to launch the ggb applet

or

follow this link

http://dmentrard.free.fr/GEOGEBRA/Maths/export4.25/Pavillons.html

Bwt: You can open this link directly in Geogebra