[NEW] finished exercice chain lesson2
[NEW] finished exercice chain lesson2

tonylucas/ecvd-js,guillaumebarranco/ecvd-js,Rouksana/ecvd-js,maechlerludivine/ecvd-js,guillaumebarranco/ecvd-js,Karimjy/ecvd-js,maechlerludivine/ecvd-js,maechlerludivine/ecvd-js,morgangiraud/ecvd-js,morgangiraud/ecvd-js,tonylucas/ecvd-js,Karimjy/ecvd-js,Rouksana/ecvd-js,morgangiraud/ecvd-js,Rouksana/ecvd-js