BALANCE OF LIGHT AND SHADOW. In many ways, the appearance of a living room is determined by how balanced light and shadow are in it. Therefore, proper illumination is very important. For example, for the convenience of staying in residential lighting, a multi-level layout of lighting fixtures is mandatory. Lighting also affects the perception of colors. CLASSICAL RULE OF THREE. Items collected in a composition of three should differ in three ways - shape, color and size. For example, you should not put three identical photos on the mantelpiece. It is preferable to choose a photo, a vase and a book as a decor - objects that differ in each other according to all the mentioned signs. PERFECT SYMMETRY - NOT PERFECT. A completely symmetrical room, equal parts of which look like a mirror image of each other, is perceived as uncomfortable to be in it. Therefore, in such a room must be present at least one asymmetric element. For example, a picture on the wall or sconces.