function digf()
   while not turtle.forward() do
      turtle.dig()
   end
end

function digu()
   while turtle.detectUp() do
      turtle.digUp()
      os.sleep(0.5)
   end
end

function straightaway()
for i = 1, 10 do
   digf()--1
   digu()
   digf()--2
   digu()
   digf()--3
   digu()
   digf()--4
   digu()
   digf()--5
   digu()
   digf()--6
   digu()
   digf()--7
   digu()
   digf()--8
   digu()
   digf()--9
   digu()
   digf()--10
   digu()
   turtle.select(3)
   turtle.back()
   turtle.placeUp()
   turtle.forward()
   local x = turtle.getItemCount(12)
   if x>1 or x==1 then
      turtle.back()
      turtle.select(2)
      turtle.place()
      turtle.select(16)
      turtle.drop()
      os.sleep(10)
      turtle.select(15)
      turtle.drop()
      os.sleep(10)
      turtle.select(14)
      turtle.drop()
      os.sleep(10)
      turtle.select(13)
      turtle.drop()
      os.sleep(10)
      turtle.select(12)
      turtle.drop()
      os.sleep(10)
      turtle.select(11)
      turtle.drop()
      os.sleep(10)
      turtle.select(10)
      turtle.drop()
      os.sleep(10)
      turtle.select(9)
      turtle.drop()
      os.sleep(10)
      turtle.select(8)
      turtle.drop()
      os.sleep(10)
      turtle.select(7)
      turtle.drop()
      os.sleep(10)
      turtle.select(6)
      turtle.drop()
      os.sleep(10)
      turtle.select(5)
      turtle.drop()
      os.sleep(10)
      turtle.select(4)
      turtle.drop()
      turtle.select(2)
      turtle.dig()
      turtle.forward()
   end
   local y = turtle.getFuelLevel()
   if y<15 or y==15 then
      turtle.back()
      turtle.select(1)
      turtle.place()
      turtle.suck()
      turtle.refuel(64)
      turtle.dig()
      turtle.forward()
   end
end
end

--Start of Program

straightaway()
turtle.turnLeft()
digf()--1
digu()
digf()--2
digu()
digf()--3
digu()
turtle.turnLeft()
straightaway()