Where does doors and windows appear in the text?

Chapter One:

"Gregor's eyes turned next to the window, and the overcast sky-one could hear rain drops beating on the window gutter-made him quite melancholy."

"In such moments he focused his eyes as sharply as possible on the window, but, unfortunately, the prospect of the morning fog, which muffled even the other side of the narrow street, brought him little encouragement and comfort."

"Behind his father his mother had torn open a window, despite the cold weather, and was leaning far out of it with her face in her hands. A strong draught set in from the street to the staircase, the window curtains blew in, the newspapers on the table fluttered, stray pages whisked over the floor. Pitilessly Gregor's father drove him back, hissing and crying "Shoo!" like a savage."