Walk animation for camera isn't playing

So I’m trying to make a walk effect to the camera when I press either W or S, but it dosen’t really work. Here is my script, is there anything wrong here?

var Player : GameObject;


function Update () {

if(Input.GetKey("w")){

    Player.animation.Play("Walk");

    }
    
    
    if(!Input.GetKey("w")){

    Player.animation.Stop("Walk");

    }
    
    if(Input.GetKey("s")){

    Player.animation.Play("Walk");

    }
    
    
    if(!Input.GetKey("s")){

    Player.animation.Stop("Walk");

    }
    
    
    
}

Try:

animation.Play("Walk");