How does Tennessee Williams' introductory description of Blanche in "A Streetcar Named Desire" foreshadow her eventual demise?

Lighting is an integral part of the construction of Blanche's character in Williams' play. Blanche is constantly fleeing into her own fantasy; light represents the harsh realities following her while the darkness allows her to indulge in dreams and escape from the ongoing passage of time. The introduction to Blanches character describes that her as "a moth" although her beauty "must avoid a strong light". This initial description immediately foreshadows Blanche's failure and destruction at the end of the play. Her need to "avoid a strong light" suggests her delicate character is unable to withstand the rough reality of her ageing and her comparison to a "moth" implies her fate lies in self-destruction akin to moth's which are attracted to the light, leading to their own death.  

Tennessee Williams uses lighting as a signpost throughout the play, charting Blanches continual demolition and this introductory description is a key part of the play. A P.E.E paragraph is the most useful tool to write appropriate essays for english exams and allow you to structure your answers and ensure all the necessary points are there to achieve a good grade.