3:08 p.m., piazza of the Georges Pompidou Center, Paris 4th. Marie Richeux and the radio show Nouvelles vagues ( New waves) on France Culture invited me to dance on a giant hopscotch in the context of the « Imagine » week-end, a collaboration between France Culture and the Georges Pompidou Center. People are invited to add boxes and to tell into the microphone memories linked to one of the inscriptions.