Book Reports / symbolism and mood in The Death of a Salesman [3]

hi
i must answer the question, "how does Arthur Miller create the mood and atmosphere of "death of a salesman"? discuss his use of symbolism.

i have started this essay and i have been writing about his use of lighting and sound. i have discussed his use of the flute music as symbolism. i was wondering what other ways does arthur miller create a mood and what other uses of symbolism are useful in this essay.

thanks for the help