jQuery deferred animation

main.js

$.when(
    $('.elem-one').animate({ left: 25, width: 200 }, 500, 'easeOutElastic')
).then(function() {
    $('.elem-two').animate({ width: 150 }, 500, 'easeOutElastic')
    return $('.elem-one').animate({ top: 108 }, 500, 'easeOutElastic')
});