Harmonic curves and the beauty of Projective Geometry

The purpose of this paper is to present projective geometry in a synthetic, visual and intuitive style through the central notion of harmonicity which leads to harmonic curves. This presentation includes new results, unpublished proofs of some classic theorems and a slight reformulation of its axiomatics.
Comment: The 11 figures are dynamic and can be viewed at: https://arquimedes.matem.unam.mx/harmonic curves/scenes.html