ImageView piano = new ImageView(new Image(ChangeInstru.class.getResourceAsStream("images/piano.png")));
        piano.setFitHeight(50);
        piano.setPreserveRatio(true);
        ImageView guitare = new ImageView(new Image(ChangeInstru.class.getResourceAsStream("images/guitare.png")));
        guitare.setFitHeight(50);
        guitare.setPreserveRatio(true);
        ImageView orgue = new ImageView(new Image(ChangeInstru.class.getResourceAsStream("images/orgue.png")));
        orgue.setFitHeight(50);
        orgue.setPreserveRatio(true);