Edit in JSFiddle

function lancer() {
  var tl = new TimelineMax({ repeat: 3, repeatDelay: 1 })
  tl.add( TweenMax.to('#cercle1', 2, { x: 100, ease: Power1.easeInOut }) )
  tl.add( TweenMax.to('#cercle2', 2, { x: 100, ease: Power1.easeInOut }), .2 )
  tl.add( TweenMax.to('#cercle3', 2, { x: 100, ease: Power1.easeInOut }), .4 )
}