How to make the mural of the asteroid big bang? Please be more specific, hehe.

First of all, there must be a complete hand-drawn manuscript, including color and shape. The next step is typing and drawing on the wall with your hands. Because many paintings of this explosive mural need to be painted, it is suggested to stick more newspapers on the wall to avoid painting unnecessary places, and cover other things that don't want to be dirty with cloth. Next, color the object with roughly correct and uniform colors. When the whole picture is drawn to a satisfactory level, you can start to repair the details, and then spray the details with a spray gun and pen. The sprayed color will be more delicate, and the rough places painted before can be properly sprayed. Then clean it up and it's OK.