Non's Wither Builder Turtle

while turtle.getItemCount(5) > 3 do
  turtle.select(1)
  turtle.dig()
  turtle.forward()
  turtle.forward()
  turtle.down()
  turtle.select(5)
  turtle.placeDown()
  turtle.turnLeft()
  turtle.place()
  turtle.turnLeft()
  turtle.turnLeft()
  turtle.place()
  turtle.turnLeft()
  turtle.up()
  turtle.placeDown()
  turtle.turnLeft()
  turtle.select(9)
  turtle.place()
  turtle.turnLeft()
  turtle.turnLeft()
  turtle.place()
  turtle.turnRight()
  turtle.forward()
  turtle.turnLeft()
  turtle.turnLeft()
  turtle.place()
  turtle.turnLeft()
  turtle.turnLeft()
  turtle.forward()
  turtle.turnLeft()
  turtle.turnLeft()
  turtle.select(1)
  turtle.place()

  turtle.select(6)
  turtle.transferTo(5)
  turtle.select(7)
  turtle.transferTo(6)
  turtle.select(8)
  turtle.transferTo(7)

  turtle.select(10)
  turtle.transferTo(9)
  turtle.select(11)
  turtle.transferTo(10)
  turtle.select(12)
  turtle.transferTo(11)

  sleep(30)
end