oby1

Actually changed it to a time line for better control and continouse animation.
var elements = document.getElementsByClassName('letter'), tl = new TimelineMax({repeat:-1, repeatDelay:2}); tl.add( TweenMax.set(elements, {opacity:0})); tl.add( TweenMax.staggerTo(elements, 0.25, { opacity: 1}, 0.25)); tl.add( TweenMax.to(elements, 3, {opacity:0})); elements.animation = tl;