Actually, the corners were supposed to be sewed outside and decorated with buttons. But I preferred to sew them inside like a boxy pouch (coz I had problems with the thickness of the corners).
And the result is not bad... Thanks to the powerful Bernina Sport that I used during the process. Gosh, I love that machine.. I think I am getting used to it. I will not bring my own sewing machine to the class *falling in love with that old Bernina ~ sorry my Brother...*
*The 'valisette' is supposed to be like in here: http://easycouture.centerblog.net/rub-valisette-.html.
* The tutorial in french is in here: Un Petit Bout de Fil