Buildings don't crop up all painted and beautiful immediately. People have to smooth the concrete face, paint the walls, and clean the windows just so that it could be presentable. After all, they are the highlights of the modern urban landscape. If they don't look good, they just stand out as eyesores. There are actually teams that are in charge of achieving these structures. They set up portable elevator platforms so that they can safely go up and down the walls to do everything they need to do. They also have danger flags set up at the top so that unnecessary personnel can be warned.

Teams that clean things from elevator platforms aren't seeing the big picture while they're up there. This means that they need to coordinate with ground teams who can guide them to the sector that they need to work on. They usually use radios to communicate with each other. However, when something goes wrong, they have to use custom flags to communicate. They wave these flags in specific ways to indicate specific messages much like the way ground crews interact with the pilots of aircraft.

The buildings that we attribute to growth and development have to be clean and shiny for the rest of the world to see. They also have to stand tall and strong to be the testament of mankind's goal of touching the skies. Otherwise, they just stand out as big, ugly pieces of concrete, steel and glass that aren't worth taking a second look at.