tunnelV2

function reFuel()
  if turtle.getFuelLevel() <= 200 then
    turtle.select(1)
    turtle.refuel(1)
  end
end
function backTrack()
  turtle.turnLeft()
  turtle.turnLeft()
  repeat
    local success, data = turtle.forward()
    if success then
    end
  until not success
end
function chestStore()
  turtle.turnLeft()
  turtle.turnLeft()
  repeat
   local success, fata = turtle.inspectDown()
   if success then
   end
   turtle.forward()
  until fata.name=="IronChest:BlockIronChest"
  turtle.back()
  for i=3,16 do
    turtle.select(i)
    turtle.dropDown()
  end
  turtle.turnLeft()
  turtle.turnLeft()
  repeat
    turtle.forward()
  until turtle.detect()
  turtle.select(1)
end

function tunnelV2(x)
  for i = 1,x do
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    turtle.turnLeft()
    turtle.dig()
    turtle.up()
    turtle.dig()
    turtle.turnRight()
    turtle.turnRight()
    turtle.dig()
    turtle.down()
    turtle.dig()
    turtle.turnLeft()
    reFuel()
    if turtle.getItemCount(16) > 0 then
      chestStore()
    end
   end
backTrack()
end
local args={...}
x=args[1]
y=args[2]
for i=1,y do
  turtle.dig()
  turtle.forward()
  turtle.digUp()
  if i%4==0 then
    print("i is : ",i)
    turtle.turnLeft()
    tunnelV2(x)
    i=i-1
    turtle.turnLeft()
  end
end