Recently, I bought a book called "Gallop! (Scanimation Books)
The picture of animals starts to move when you open the book.
That is so amazing.
This is a Flash which is an accurate reproduction of the book. (motion-simulated)
Why does a horse run?
This Flash contains only two pictures.
What only moves is the slit.
In this animation, only the slit of ② is moving.
Why does the horse look like running.
Look at the Flash carefully and think.