bridge3

while true do
  turtle.back()
  turtle.select(1)
  turtle.placeDown()
  turtle.back()
  turtle.select(2)
  turtle.place()
  turtle.select(1)
  turtle.placeDown()
  turtle.back()
  turtle.placeDown()
  turtle.place()
  turtle.up()
  turtle.select(3)
  turtle.place()
  turtle.down()
  turtle.back()
  turtle.select(2)
  turtle.place()
  turtle.select(1)
  turtle.placeDown()
  end