What is the author's style in Sweet Bird of Youth by Tennessee Williams?

Throughout Sweet Bird of Youth, Williams calls for a cyclorama (a large wall placed at the back of a room or stage) on which to project images onto the stage behind the action. The images are not supposed to be realistic, but are intended to help set the mood of the play and underscore the setting. For most of the play, the image is a grove of palm trees blowing in the wind. The wind goes from soft to loud, depending on the action of the scene. When the wind is loud, it blends with the musical score in a specific sound/song called "The Lament." This is used in act 1, scene 1, for example, when the Princess' memory finally returns and she first mentions that she is in hiding after what she believes has been a disastrous career move. Other images include a daytime image of the calm sea and sky, and a nighttime scene of a palm garden with branches and stars.