Trois exercices sur l'écran d'épingles d'Alexeieff: Animated short film made in three parts on the pin screen by Alexeieff-Parker. With these three exercises, director Jacques Drouin experiments with the play of light and shadow alone. Original, this experience presents us with a reality that is not truncated although it may appear as follows: the faculty of wonder will be able to create the necessary link between everyday life and the way it was rendered.