The symbols on the wall correspond to the big map of the outside world. There is a pattern of the sun in the upper left corner, a heart-shaped pattern on the door of the house in the middle and upper part, a moon staring at the lake in the upper right part, an apple on the tree in the middle and right part, a butterfly with eyes on its wings in the middle and left butterfly park, a cat pattern behind a street sign in the lower left part, a green circle on a billboard in the middle and lower part, and a star pattern on a picture book in the house in the lower right part. The button indicates the location of the big map, and the pattern on the wall corresponds to the location on the map.