turtle Program to get fuel level

Hey, i need some assistant making a program to show fuel level of the turtle i have no clue how to do lua coding so i just type crap and see what happen, I'm going to get in depth with turtles sometimes but now i'm just trying all the basic stuff you can do.

I only know one line that needs to be in the program, turtle.getFuelLevel() more then this line i have no clue of

print(turtle.getFuelLevel())

lol

… and there is a program already, type 'refuel' in the terminal

Ok thanks