Wax Looks What Is The Correct Name For Wall Decals (that Looks Like They Are On Wax Paper And You Put Them On Your Wall)?

What is the correct name for wall decals (that looks like they are on wax paper and you put them on your wall)? - wax looks

I saw someone take office and flowers around the base and leads to the walls. They said they did not paint, but put it with a kind of sticker. He said it was like in wax paper and place it on the road and rubs it (with a stick as a stick Popsickle) that bears its walls. It was really impressive. What is the correct name, and you can buy?