Open AI, create a new document, and be familiar with the basic tools in the left toolbar, such as pen tracing path, black arrow clicking, moving, white arrow editing tracing point, polygon drawing, etc. Then familiar with the commands on the bar, such as rotation, deformation, blur, path finder, stroke color, gradient and so on. And be familiar with the stacking of films of different colors, that is, the stacking order of the films you borrowed. After mastering these commands, you can draw the outline.