[LUA]How do i make a program loop?

Hi! i want to make my program loop, i have done so it is in startup on my main computer so i can acces it easily, but i want it to loop. it is a program that sends a message to a turtle to turn on the lights and open the door but i always have to type in reboot or startup agian before i can type another command, i want to make it so i can type commands non stop until i exit it manually. not just one command and it exits itself. please help :)/> i am very new to this.

Infinite loops are usually best done with while true do.

while true do
  -- stuff
end

thanks! it worked :D/>