étape 4 FF0000 4 1454.9 1627.1 1685.3 1713.7 1740.5 1598.3 1589.9 1534 1576.1 1589.5 1600.9 1578.7 1568.1 1631.8 1576.9 1566.2 1583.7 1622.2 1599.1 1592.4 1591.8 1591.1 1595.3 1578.6 1545.3 1521.1 1407.4 1367.6 1337.8 1327.8