View difference between Paste ID: ZK5vvzZY and 6dL9yTnq

 local args = {...}
 
 if #args < 2 then
   print("Need some parameters!")
   print()
   print("Usage:")
   print("elevator <direction> <floors>")
   print()
   print("direction is down or up")
   print("floors is a number")
   print("ie")
   print("elevator up 4")
   return
 end
 
 direction = args[1]
 
 levels = tonumber(args[2])
 if levels <= 0 or levels == nil then
   print("What the heck? I need a number to go up or down!")
   return
 end
 if turtle.getFuelLevel() < levels then
   print("I need some fuel, please give me fuel!")
   return
 end
 
 direction = string.lower(direction)
 direction = string.sub(direction,1,1)
 
 if direction == "d" or direction == "u" then
 for i=1,levels do
   if direction == "d" then
     print("Going Down!")
     turtle.down()
   else
     print("Going Up!")
     print("Waiting for you to jump!")
     while not turtle.up() do
      print("Jump Now!")
     end
   end
 end
 else
   print("You can't follow instructions can you?")
 end