What do you see as the play begins?

From the text:

"Before us is the Salesman’s house. We are aware of towering, angular shapes behind it, surrounding it on all sides. Only the blue light of the sky falls upon the house and forestage; the surrounding area shows an angry glow of orange. As more light appears, we see a solid vault of apartment houses around the small, fragile-seeming home. An air of the dream dings to the place, a dream rising out of reality. The kitchen at center seems actual enough, for there is a kitchen table with three chairs, and a refrigerator. But no other fixtures are seen. At the back of the kitchen there is a draped entrance, which leads to the living room. To the right of the kitchen, on a level raised two feet, is a bedroom furnished only with a brass bedstead and a straight chair. On a shelf over the bed a silver athletic trophy stands. A window opens onto the apartment house at the side."

you have a view of the lomans house. the quote'' surrounding it on all sides'' indicates to us that the loman house is shaded by shadows. they have no access to the sunlight as tall houses surround them.