It is said that the human’s field of vision is maximum 55 degrees for upside 80 degrees for downside. Usually people just use 10 degrees to 30 degrees of this space.

Although people think they are very familiar with the things they see in every day life -and may be board of the sights - in fact they don’t see or know about almost half of their mundane life.

I made some tiles that have images of the ceilings and placed them on the floor.
When people come across them, they will engage with the rest of their world and they will start to investigate it.