digAuto

print("How much i must dig?")
total = tonumber(read())
long = 0
torch = 0
while true do
  if total > long then
    turtle.dig()
    turtle.forward()
    turtle.digUp()
    long = (long + 1)
    torch = (torch + 1)
    if torch == 4 then
      turtle.select(16)
      turtle.back()
      turtle.placeUp()
      turtle.forward()
      torch = 0
    end
    bloc = turtle.detectDown()
    if not bloc then
      turtle.select(15)
      turtle.placeDown()
    end
  else
    return
  end
 end