How they did it, since May the 4th is coming up

That's similar to how it was done for years previously, where the transparent acetate would be on a scroll and the crank would be turned, hence the term "roll the credits".

There were always FX...Lukas just brought it to another level

[media=https://youtu.be/jAtULl3ExUo]

Back when the Death Star was just a tennis ball painted grey on a piece of string, LOLZ
乂^◡^乂