The cinema workshop «Fond vert» takes the form of a stall where the inhabitants are invited to create their own film using the special effects of the cinema, including the inlay. It is an invitation to return to the time when cinematic art took the form of a show, to relive, in the 21st century, the tribulations of Méliès, Gaumont and Pathé, the pleasure and magic of special effects. The decor transforms, and transforms the people who lend themselves to the game of the shoot said «on a green background». After filming, a simultaneous editing on an outdoor screen, allows participants to discover their film and the reality of how the special effect works. The workshop will take place in the courtyard of the Pavillon Vendôme.