[.kill() is not working]

I have this tween that repeats infinitely:

 

var sparkleblink = TweenMax.staggerTo(".confetti", .5, {ease:Linear.easeNone, opacity:.2, repeat:-1}, .01);

 

but I want to stop this animation after a certain point. I have a TimelineLite() which calls a function after the last animation:

 

var tothebox = new TimelineLite();
	tothebox.to(".scrollnotif", .1, {opacity:0})

		// ** other animations here** //
          
		.to(".scrollnotif", .1, {opacity:1, onComplete:killthis});

 

Then I have that function that's being called onComplete: 

 

function killthis(){
	sparkleblink.kill();
}

 

Not sure if I'm missing something or what. Advance thanks for whoever is going to help!