Two important visual elements of theater are scenery and costumes, which are used both to convey information and to create mood. Scene and costume designers develop and organize these visual aspects of theater production. The scene designer's goals are to help set the tone and style of the production, to establish locale and period, to develop a design concept, to coordinate the scenery with other production elements, and to solve any practical design problems. The basic elements used by the scene designer are line, mass and composition, texture, and color. The costume designer also helps establish the tone, style, historical period, and locale of the play. In addition, the costume designer helps indicate the personality and social status of the characters and the relationships between them. Related to costume are makeup, hairstyles, and masks. Both scene and costume designers also work closely with those who construct the sets, props, and costumes to see that these elements work properly during productions and that the performers can use them safely and easily.