View difference between Paste ID: qfhdM4Tw and 3YG7MfLw

 local function move(f)
     if turtle.getFuelLevel() == 0 then
         for slot=1,16 do
             turtle.select(slot)
             if turtle.refuel(0) then
                 turtle.refuel(1)
                 break
             end
         end
         if turtle.getFuelLevel() == 0 then
             print("No fuel, stopping...")
             return false
         end
     end
     -- mooooooveeee soooooo4aaaaraaa
     while not f() do
       turtle.dig()
       turtle.attack()
       sleep(1)
     end
 end
 
 -- return true if item count in slot 2 == 64
-local function refill2(needRefill)
+local function refill2()
   local cobbleCount = turtle.getItemCount(2)
   local refillCount = 64 - cobbleCount
   if (cobbleCount == 0) then
         print("Out of tunnel buildblock: place buildblock in slot 2 to continue")
         repeat
             sleep(1)
         until (turtle.getItemCount(2) > 0)
-  elseif (cobbleCount < 16 or needRefill) then
+  else
     for n = 3,16 do
       turtle.select(2)
       if (turtle.compareTo(n) == true) then
                 turtle.select(n)
                 if (refillCount > turtle.getItemCount(n)) then
                     turtle.transferTo(2, turtle.getItemCount(n))
                     refillCount = 64 - turtle.getItemCount(2)
                 else
                     turtle.transferTo(2, refillCount)
                     break
                 end
        end
     end
   end
   return turtle.getItemCount(2) == 64
 end
 
 
 local function place()
-    refill2(false)
+
     refill2()
     turtle.select(2)
     turtle.place()
     return true
   end
   return false
 end
 
 
 local function placeUp()
-    refill2(false)
+
     refill2()
     turtle.select(2)
     turtle.placeUp()
     return true
   end
   return false
 end
 
 
 local function placeDown()
-    refill2(false)
+
     refill2()
     turtle.select(2)
     turtle.placeDown()
     return true
   end
   return false
 end
 
 
-    refill2(true)
+
     for slot=3,16 do
         inSlot = turtle.getItemDetail(slot)
         if inSlot.name == "minecraft:cobblestone" then
             turtle.select(slot)
             turtle.drop()
         end
     end
 end
 
 
 local function dig()
     while turtle.detect() do
         turtle.dig()
     end
 end
 
 
 local function digUp()
     while turtle.detectUp() do
         turtle.digUp()
     end
 end
 
 -- 1 floor step
 local function step1()
   dig()
   move(turtle.forward)
   placeDown()
 end
 
 -- 2 floor step
 local function step2()
   dig()
   move(turtle.forward)
   placeUp()
 end
 
 
 local function placeTorch()
   turtle.select(1)
   if turtle.getItemCount() < 1 then
     print("No torches in slot 1, place torches in slot 1")
     return false
   end
   turtle.turnRight()
   turtle.place()
   turtle.turnLeft()
   return true
 end
 
 
 -- MAIN
 local args = { ... }
 local length = 0
 local width = 3
 local depth = 0
 
 if #args < 1 then
   print( "Usage: tunnel <length> [width, default 3]" )
   return
 else
   length = tonumber( args[1] )
   if length < 1 then
 	print( "Tunnel length must be > 0" )
 	return
   end
 end
 
 if #args > 1 then
   width = tonumber( args[2] )
   if width < 1 then
 	print( "Tunnel width must be > 0" )
 	return
   end
 end
 
 print( "Tunnelling: length="..length.." width="..width.." height=2" )
 
 for i=1,length do
   step1(false)
 
   turtle.turnRight()
 
   for j=2,width do
     step1()
-    if (i % 8 == 0) and (j % 8 == 0) then
+    if (i % 7 == 0) and (j % 7 == 0) then
       placeTorch()
     end
   end
 
   place()
   digUp()
   move(turtle.up)
   place()
   placeUp()
 
   turtle.turnRight()
   turtle.turnRight()
 
   for j=2,width do
     step2()
   end
 
   place()
   move(turtle.down)
   place()
   turtle.turnRight()
 
-  if i % 8 == 0 then
+  if (i == 2) or (i % 7 == 0) then
     placeTorch()
   end
 
   depth = depth + 1
 
-  if turtle.getItemCount(2) > 50 then
+  if refill2() then
     emptyStash()
   end
 end
 
 print( "Returning to start..." )
 
 -- Return to where we started
 turtle.turnLeft()
 turtle.turnLeft()
 while depth > 0 do
   move(turtle.forward)
   depth = depth - 1
 end
 turtle.turnRight()
 turtle.turnRight()
 
 print( "Tunnel complete." )