View difference between Paste ID: 6xs8zq0K and TSzsjM9b

 local tArgs = { ... }
 if #tArgs ~= 1 then
 	print( "Usage: quarry size <length>" )
     print( "Place blocks in slots 1 - 14, place landmarks in 16" )
 	return
 end
 
 -- Set length with user input
 local length = tonumber( tArgs[1] )
 if length < 1 then
 	print( "Side length must be positive" )
 	return
 end
 local curSlot = 1
 function putblockdown()
     if not (turtle.detectDown()) then
-        while turtle.getItemCount(curSlot) == 0 and curSlot < 16 do
+        while turtle.getItemCount(curSlot) == 0 and curSlot < 15 do
         	curSlot = curSlot + 1
 		end
         turtle.select(curSlot)
         turtle.placeDown()
     end
 end
 
 -- Place Landmark in front
 function placelmf()
     if not (turtle.detect()) then
 	    putblockdown()
         turtle.back()
       	turtle.select(16)
         turtle.place()
     end
 end
 
 -- Place Landmark left and right
 function placelmb()
     if not (turtle.detect()) then
         turtle.turnRight()
         turtle.forward()
 		putblockdown()
         turtle.back()
       	turtle.select(16)
         turtle.place()
         turtle.turnLeft()
         turtle.turnLeft()
         turtle.forward()
 		putblockdown()
         turtle.back()
       	turtle.select(16)
         turtle.place()
         turtle.turnRight()
     end
 end
 
 
 
 function backhome()
     x = length
     while x > 0 do
 	-- putblockdown()
 	turtle.back()
     x = x - 1
--- Move forward <length> times
+
 end
 -- Move length to place first Landmark and return home
 local i = 0
 while i < length do
 	turtle.forward()
     i = i + 1
 end
 
 placelmf()
 backhome()
 turtle.back()
 turtle.turnLeft()
 
 -- Build platform for quarries and power
 
 local i = 0
 while i < 11 do
     putblockdown()
     turtle.forward()
     i = i + 1
 end
 
 turtle.turnRight()
 turtle.forward()
 turtle.forward()
 turtle.turnRight()
 turtle.forward()
 
 local i = 0
 while i < 11 do
     putblockdown()
--- That's all, folks!
+
     i = i + 1
 end
 
 turtle.turnRight()
 turtle.forward()
 turtle.turnRight()
 
 -- Move length and place Landmarks on both sides then return home
 
 local i = 0
 while i < length do
     putblockdown()
     turtle.forward()
     i = i + 1
 end
 
 placelmb()
 backhome()
 turtle.turnLeft()
 turtle.forward()
 
 -- Move length and place landmark for 2nd quarry then return home
 
 local i = 0
 while i < length do
 	turtle.forward()
     i = i + 1
 end
 
 placelmf()
 backhome()
 
 -- Fin
 print("Quarry setup")
 return