The staging of simple gestures is something of a modus operandi for Ismaïl Bahri. Preparing for a solo exhibition at Selma Feriani Gallery’s Tunisian branch in Sidi Bou Said, the Tunis-born, Paris-based artist stuck series of metal pins on the dazzlingly white walls of the ancient village. The sun determines their position: the second pin is placed at the end of the long shadow projected by the first one and so on, until, for a fleeting few minutes, a whole line appears on the surface. As the earth rotates, the line breaks up and gradually vanishes, reappearing the following day ever-so-slightly transformed by the time elapsed—literally a shadow of its former self.