playing whole animation clip before stopping

I looked around the forum but can not seem to find the answer to this, I'm sure it's cake for you guys, but I am a complete amateur and have never written a line of code before so hopefully I can enlist your help. All I'm trying to do is have a 1 second animation play when I hit the "E" button and stop upon release. This is what I have:
function Update () {
if (Input.GetKey(KeyCode.E))
animation.Play("Fab_Spray");
//yield WaitForSeconds(2);
//yield WaitForSeconds(animation.clip.length);

if (Input.GetKeyUp(KeyCode.E))
animation.Stop("Fab_Spray");
//animation.Rewind("Fab_Spray");

}

Right now this plays the animation when I hold down "E" but if I release, it stops in the middle of the clip. I tried the wait for seconds command but instead it froze my animation and nothing happens. I am lost on what it going on or how to get what I want, if anyone could offer assistance it would be greatly appreciated.