digline

if turtle.getFuelLevel() == 0 then
  turtle.select(1)
  turtle.refuel(4)
end

local function DigLine(wl)
  local moved = 0
  for i=1, tonumber(wl) do
    if turtle.detectDown() then
      print("detect block")
      turtle.digDown()
    else
      print("no block")
    end
    turtle.forward()
    moved = moved + 1
    print("moved:"..tostring(moved))
  end
  for i=1, moved do
    turtle.back()
  end
end