Spatial frequency
Things repeat in time and space with their own variations.
A look through a window into the world of someone from the neighborhood, letting us see through and have the curiosity to look even further, what's inside the next building.
The characteristics of glass are letting us see what's outside before the window, what's inside, behind it and thanks to the second window, what is beyond and spot even more windows.
Boryana Dzhivdzhanova, Bulgaria, Sofia