Morphing: a special effect in movies and animations that changes one image into another through a seamless transition.
Note: There were: 16 Democratic presidents, 2 presidents with no parties, 2 Federalist presidents, 4 Whig presidents, 5 Democratic-Republican presidents and 18 Republican presidents. This is a history of the elected presidents right up to present time. It is not a political statement, endorsement or forecast.   Wiki: Morphing  Boléro  Ravel