View difference between Paste ID: H4qteeGi and 9rHDHJRY

 print("Hello World")
 --TurtleTower
 
 --Check arguments for correct formatting
 local args = { ... }
 if #args ~= 1 then      --Check if it's not exactly 3 arguments.
     shell.run("clear")
     print("Invalid number of arguments")
     print("turtletower [height]")
     do return end
 end
 for i = 1, 1 do            --Step through each argument and make sure it is a number greater than 1.
     if tonumber(args[i]) < 2 then
         shell.run("clear")
         print("Invalid arguments")
         print("All measurements must be numbers greater than 1")
         do return end
     end
 end
 --------------------------------------------------
 
 --commandline arguments [height]
 length = tonumber(args[1])  --length of square
 slotnum = 1
 --------------------------------------------------
 
 for i = 1, length do
     if not turtle.detectUp() then
         turtle.up()
     end
     for j = 1, 4 do
         for k = 1, 3 do
             if not turtle.detectDown() then
                 if turtle.getItemCount(slotnum) < 1 then
                     slotnum = slotnum + 1
                     turtle.select(slotnum)
                 end
                 turtle.placeDown()
             end
             turtle.forward()
         end
         turtle.turnRight()
         turtle.forward()
     end
 end
 turtle.forward()
 turtle.forward()
 turtle.turnRight()
 turtle.forward()
 for i = 1, length do
     turtle.down()
 end
 turtle.turnRight()
 turtle.turnRight()
 turtle.dig()
 turtle.up()
 turtle.dig()
-turtle.down
+turtle.down()
 turtle.turnRight()
 turtle.forward()
 turtle.turnRight()
 for i = 1, length do
     turtle.up()
     turtle.forward()
     turtle.select(9)
     turtle.placeDown()
     turtle.select(slotnum)
     turtle.forward()
     if turtle.getItemCount(slotnum) < 1 then
         slotnum = slotnum + 1
         turtle.select(slotnum)
     end
     turtle.placeDown()
     turtle.turnRight()
 end