Can someone help me understand the point of rickrolling someone. I personally love the song but like honestly I dont understand

Look at this painting by cimabue. this painting demonstrates the use of

Order the events as they occurred in history. thomas edison and william dickson invent the kinetoscope. the view from the window at le gras is created. disney produces flowers and trees, the first color film. stanley kubrick revolutionizes special effects with 2001: a space odyssey. muybridge creates the horse in motion. francis ford coppola’s apocalypse now is selected for preservation by the library of congress. d. w. griffith directs the birth of a nation. marilyn monroe makes her film debut.

For the difference command to work, what needs to happen?