blockRemove

function remove()
  local length = 0
  while turtle.detect() do
    while not turtle.forward() do
      turtle.dig()
    end
    length=length+1
  end
  if length>0 then
    turtle.turnRight()
    remove()
    turtle.turnLeft()
  end
  for i=1,length do
    while not turtle.back() do
      os.sleep(1)
    end
  end
end

remove()