View difference between Paste ID: QPKF7WCZ and 1DfH52Cn

 local h = 1
 local fuelSlot = 1
 local stonePlace = 5
 local stoneReserve = 6
 local stoneReserveX = 7
 local glassPlace = 9
 local glassReserve = 10
 local glassReserveX = 11
 
 local blanks = 0
 
 function filler()
  if turtle.getFuelLevel()<10 then
   turtle.select(fuelSlot)
   turtle.refuel(1)
  end
  if turtle.getItemCount(stonePlace)<3 then
   if turtle.getItemCount(stoneReserve)>=1 then
    turtle.select(stoneReserve)
   else
    turtle.select(stoneReserveX)
   end
   turtle.transferTo(stonePlace)
  end
-  turtle.select(glassReserve)
+
-  turtle.transferTo(glassPlace)
+    if turtle.getItemCount(stoneReserve)>=1 then
      turtle.select(glassReserve)
     else
      turtle.select(glassReserveX)
     end
     turtle.transferTo(glassPlace)
    end
  end
 
  turtle.select(stonePlace)
 end
 
 function digMove()
  turtle.down()
  turtle.digDown()
 end
 
 function digToBedrock()
  turtle.digDown()
  while not turtle.detectDown() do
   filler()
   digMove()
  end
 end
 
 function checkForward()
   turtle.select(glassPlace)
   if (not turtle.detect()) or (turtle.compare()) then
     blanks = blanks + 1
   end
 end
 
 function placeWhat()
   blanks = 0
   checkForward()
   turtle.turnLeft()
   checkForward()
   turtle.turnRight()
   turtle.turnRight()
   checkForward()
   turtle.turnLeft()
   if (blanks == 0) then
    turtle.select(stonePlace)
   else
     turtle.select(glassPlace)
   end
 end
 
 function movePlace()
  if turtle.up() then
   turtle.placeDown()
   h = h + 1
  else
   turtle.digUp()
  end
 end
 
 function run()
   digToBedrock()
 
   while h < 123 do
    filler()
    if h < 70 then
      placeWhat()
    else
      turtle.select(stonePlace)
    end
    movePlace()
   end
 end
 
 run()