Run Animation backward first and then forwards with CSS

Use the animation-direction property to run animation in first backward and then forward. The property is used with the alternate-reverse animation value to achieve this.


Live Demo

<!DOCTYPE html>
         div {
            width: 150px;
            height: 200px;
            position: relative;
            background-color: yellow;
            animation-name: myanim;
            animation-duration: 2s;
            animation-direction: alternate-reverse;
            animation-iteration-count: 3;
         @keyframes myanim {
            0% {background-color:green; left:0px; top:0px;}
            50% {background-color:maroon; left:100px; top:100px;}
            100% {background-color:gray; left:0px; top:0px;}