Element e3 = new Element();
e3.setLibelle("Terre");
e3.setUrl_image("/ressources/Element_Terre.png");
e3.setID(3);
question.addFixedElement(e3);
Element e4 = new Element();
e4.setLibelle("Eau");
e4.setUrl_image("/ressources/Element_Metal.png");
e4.setID(4);