gif for inspiration

I couldn't find who is the author and where this gif comes from, but I'm amazed by it.

It reminded me the art project where artists animated the mutation of the previous artist's character. The project called "Think about mutation".

The Old Mill (1937)

The quality of  animation and colours of Disney animation are advancing.
The short 'The old Mill' proves Disney develops and improves visual effects and beautiful film colours each film they make.
I saved this link as a good example of wonderful illusions as well as animation of rain, lightning and clouds.