Hello Everyone, im new to Untiy and making an FPS game, so far, everything works fine, but I have a small problem I want it so that i can only use this

if(Input.GetButtonDown ("Shoot")){  //Click

ammo = ammo-1; //Lose  Ammo

animation.Play ("SHOOT");  
}

Only when animation IDLE is playing, so I cant shoot a second time when the shoot animation is already playing if you know what I mean

THanks in advance