Have you ever worked in a boring, windowless office whose gray cubicle walls are the only thing you see all day? I certainly have. I once worked in an office where the most colorful image my eyes landed on was a phone extensions sheet tacked on a bulletin board. Pink and blue colors highlighted the various departments. That was it. It’s not uncommon in the modern world for offices to be enclosed environments without a window view of trees or greenery. But it doesn’t have to be this way. If…