Forum:Scrap-iron scarecrow

hello, i had a question about how "scrap-iron scarecrow" works. this crad states to "Activate only when an opponent's monster declares an attack. Negate the attack and Set this card face-down again instead of sending it to the Graveyard" does that mean that i can keep using this card over and over every time a monster attacks me until my opponent can destroy this card? its just a bit confusing the way they worded this.