A drama or play consists of dialogue between characters and stage directions. It can be presented as a written script or live performance. The key elements of drama are dialogue, which is what the characters say, and stage directions, which provide instructions for actors. A play typically has multiple acts that may contain several scenes. Comedies and tragedies are the two main types of drama. Comedies emphasize human weaknesses through humor, while tragedies show the downfall of a heroic character. Performing a play involves directing actors, designing sets and costumes, and following rules of theater etiquette.