The Engpsh term for the pattern outside a window is "the view outside the window". This term is derived from the fact that the window allows us to see what is outside, and the pattern or arrangement of objects or scenery that we see is the view.

Here are some example sentences and their translations:

The view outside my window is of a bustpng city street. (我窗外的景色是一条繁忙的城市街道。)
I love waking up to the beautiful view outside my bedroom window. (我喜欢被我卧室窗外的美景吵醒。)
The view outside the window changes with the seasons. (窗外的景象随着季节而变化。)