View difference between Paste ID: BHTVHpbg and BjGXZxTw

 local h = 1
 local fuelSlot = 1
 local stonePlace = 5
 local glassPlace = 9
 
 local blanks = 0
 
 function filler()
  if turtle.getFuelLevel()<10 then
   turtle.select(fuelSlot)
   turtle.refuel(1)
  end
  if turtle.getItemCount(stonePlace)<2 then
   stonePlace = stonePlace + 1
  end
 
  if turtle.getItemCount(glassPlace )<2 then
   glassPlace = glassPlace + 1
  end
 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()