The line is a collection of a number of points that have elongated dimensions and specific direction to the two ends apart. In the line drawing is the result of real scratches and the limit of an object, space, time and color series. The lines can be long, short, thick, thin, straight, curved, wavy, vertical, horizontal, diagonal, and so on.
The function of the line gives the impression of harmony, movement, rhythm, suggestions, symbolic message, texture, code illusion, and illusory. According to its form, the line can be divided into two, namely:
Vertical line, describe the nature of firm, heightening the object, an infinite