You forgot to close your function with an end.
myrroddin already explained to you what the variables in your vararg portion will be. I just wanted to give you reference on what a vararg is.
https://www.lua.org/pil/5.2.html
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"You'd be surprised how many people violate this simple principle every day of their lives and try to fit square pegs into round holes, ignoring the clear reality that Things Are As They Are." -Benjamin Hoff,
The Tao of Pooh