Turtle + Well NEU

while true do
if turtle.detectDown() then
   turtle.back()
   turtle.select(2)
   turtle.place()
   turtle.select(3)
   turtle.placeDown()
   turtle.up()
   turtle.select(4)
   turtle.placeDown()
   turtle.up()
   turtle.select(5)
   turtle.placeDown()
   turtle.up()
   turtle.select(6)
   turtle.placeDown()
   turtle.forward()

   sleep(6.0)

   turtle.back()
   turtle.select(6)
   turtle.digDown()
   turtle.down()
   turtle.select(5)
   turtle.digDown()
   turtle.down()
   turtle.select(4)
   turtle.digDown()
   turtle.down()
   turtle.select(3)
   turtle.digDown()

   turtle.forward()
   turtle.select(2)
   turtle.dig()
   turtle.forward()
   turtle.select(1)
   turtle.digDown()
   turtle.forward()
   turtle.select(1)
   turtle.placeDown()
   sleep(1.0)
   end
end