Light to flash once with hit of a button:

I need a light to flash once when the Fire1 button is hit once-

I have this code in C#

if(Input.GetButtonDown("Fire1"))
		{
			if(BlastFlash.enabled){
            BlastFlash.enabled = false;
        }
            if(!BlastFlash.enabled){
            BlastFlash.enabled = true;
		}

What do I need to do to make this happen??

I solved this by making a light in my particle system- when the particle system dies the light does as well…;]