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                <div class="wrapper">
  <div class="roles">
          I am a web developer.
          I am a game creator.
          I am a student.
          I am an aspiring individual.


                body {
  background: #f1f1f1;
  color: #222;
  font-family: 'Open Sans', sans-serif;

.wrapper {
  padding: 100px;
  width: 500px;
  display: block;
  text-align: center;
  margin: 0 auto;

.roles {
    font-size: 30px;
    height: 50px;
    vertical-align: middle;
    overflow: hidden;

.roles div {
    height: 50px;
    transition: margin-top 1s ease-in-out;


                var current = 1; //keeps track of the current div
var height = $('.roles').height(); //the height of the roles div
var numberDivs = $('.roles').children().length; //the number of children of the roles div
var first = $('.roles div:nth-child(1)'); //the first div nested in roles div
setInterval(function() {
    var number = current * -height;
    first.css('margin-top', number + 'px');
    if (current === numberDivs) {
        first.css('margin-top', '0px');
        current = 1;
    } else current++;
}, 2000);