So For costume designer what do you do in that class in college?

Costume designers often begin their careers as costume makers, with a bachelor's degree in costuming and a master's degree at the maximum. They might start by interning for university costume departments or working on college or community shows.

the correct answer for this question is:

it is system invented in 1872 that produced the first illusion of movement. basically it was a disk with a series of drawings around the edge, showing the same object in slightly different poses. when it was spun, it created the illusion of movement.

found this online : )