Introduction

Based on an object-oriented paradigm understandable by any person.

• Can you draw the picture at instant 0 or 2 ?
• Can you imagine other kinds of graphical objects ?
  Other operations (called messages) on these objects ?

Communication & objects' diagrams

Nb. "Object-Oriented (OO) concepts" are usefull in the sense they are not restricted to software engineers and can be used by client or any person involved in software development.