There are 12 dots on the top above the elevator door. Make all the diagonals add up to 12 to match the dots. The image below is one way to solve the floor:
Eve and her comrades land on the surface to reclaim the extinct Earth and cross paths with a survivor named Adam. Eve is then led by Adam to the last surviving city, Xion, where she meets the elder of the town Orcal and is told many stories. In order to serve her mission to save Earth, Eve develops close relationships…