Revert "Revert "change piste 3""

This reverts commit 4afe6c6233f4d91d65cd7a12b5c4fcf587da32fe.
Revert "change piste 3"

This reverts commit 7b8459f7e31c42f41e162ecf79dda9aad3ecf78c.
Revert "ajout des fichiers"

This reverts commit 4be3293a23b26e846f03e9b760289b0f567739c4.