Jeo, creo que no hay ninguna funcion built-in para hacer un countdown en lua. Pero se puede jugar con los os.time(), por ej así:
Ahora se puede editar para que haga print del tiempo que falta.
"Wash the poison from of my skin, show me how to be whole again."
"I wanna heal, I wanna feel like I'm close to something real."
"I don't know how I got this way, I'll never be alright."
"My tea's gone cold, I'm wondering why I got out of bed at all. The morning rain clouds up my window, and I can't see at all."
"I guess words are a mothafucka, they can be great, or they can degrade, or even worse they can teach hate."
"Now you shut up bitch! I am talkin'! Thought I was full of horseshit and now you fuckin' worship the ground in which I am walkin'!"
"But no matter how many fish in the sea, it'd be so empty without me."