How could you translate an engraving to animation? Posada's Calavera animated in less than 3 hours!

How could you translate an engraving to animation? How should the lines and texture move? ‪@tazatriste‬ took José Guadalupe Posada’s amazing “Calavera con guitarra” and used vectors, bones, brushes and Smart boil to give life to it. The entire process took less than three hours!