By changing the ways in which they paint, apply colour, texture, perspective or the way they see shapes and ideas the artist lays down a different set of "rules". Over a short period of time, if other painters see the rules as being valid for themselves they will also pick up the characteristics. The works then take on a similar form or "style". The artists themselves may give the style a name - "Expressionist" for example, or the style may be given a name such as "Abstract". The name now determines the style of painting.