At first the cowardly lion is well a coward, but as the movie progresses, the Cowardly Lion starts getting through obstacles. In the end he's not a cowardly lion anymore he's a brave lion.
For an artist, the use of line is the starting of drawing as if an artist pick a drawing pencil to make some kind of picture, design, logo, etc so first he or she draws a line that shows that the drawing is started.
They have unique ideas, creativity to draw anything which looks attractive to the audience.
