PLOT: One can accept the line a priori as given or, however, a posteriori see originating from the movement of a point, from the connection of two points or from the rotation of a surface if from the viewer seen all surface-limitative lines collapse in an excellent position. Movement and with it energy is necessary for all origin kinds of the line. In both in parallel running films I show simultaneous the basic subject, the line, and the variation of the basic subject, the line variation.