Set animation with a slow end using CSS

Use the animation-timing-function property, with the ease-out value to set animation with a slow end with CSS


Live Demo

<!DOCTYPE html>
         div {
            width: 150px;
            height: 200px;
            position: relative;
            background-color: #808000;
            animation-name: myanim;
            animation-duration: 2s;
            animation-direction: alternate-reverse;
            animation-iteration-count: 3;
         @keyframes myanim {
            from {left: 100px;}
            to {left: 200px;}
         #demo {animation-timing-function: ease-out;}
      <div id = "demo">ease-out effect</div>