$('#carousel').on('slide.bs.carousel', function (event) {
target = $(event.relatedTarget);
var tlSlider = new TimelineMax()
.from( target.find('h1'), 0.5, { scale: 600, autoAlpha: 0,})
.from( target.find('h2'), 0.5, { y: 150, autoAlpha: 0,});
});
https://getbootstrap.com/docs/4.0/components/carousel/#events