The picture you painted of how something once full of life and beauty can slowly fall apart until only emptiness remains touching. The “darkened windows” made me think of moments in life when hope fades, and everything that once felt warm turns cold. I’ve been through times like that when effort seemed wasted, and joy slipped away quietly. Life can be the mixture of joy and sorrow, and the good thing will be if it ends on a happy note.
If we don't maintain, thing fall apart. A home, a car, a relationship.