How to write graffiti slogans at will?

There are two answers: 1. There is a wall on the busy street. At first, the walls were white, spotless and very white. Later, with the erosion of sunlight and rain, the walls began to fade and gradually turned pale yellow. Later, some people began to do something on the wall. Instead of painting it white, they scribbled on it at will, with everything. At first, people thought it was a kind of performance art, and it could also add some color to the wall. But then, some uncivilized behaviors appeared. People began to resent this kind of behavior. But there's nothing to do. Finally, one day, a brave man wrote on the wall: "No graffiti on the wall, and offenders will be fined." Everyone couldn't help laughing when they saw the slogan. There is a feeling that a thief shouts to catch a thief. You'd better paint the wall white. 2. So this idea tells us to protect and care for the environment, but this method is not desirable and wrong. I'll write a draft and you can add it. Xiaoming sees people often doodle on the school walls. He can write some detailed descriptions of other people's graffiti and then want to change this situation. Then he wrote a word forbidding graffiti on the wall. After returning home, he told his father that it is good for you to be responsible, but this method is not desirable. Pay attention to the expression. Then Xiao Ming accepted it humbly and cleaned the wall the next day. It is praised by the teacher and used at the end. We should also use appropriate methods to point out the topic, sublimate the theme, and enhance the height of conception.