.zoombie {
    position: absolute;
    width: 200px;
    height: 312px;
    bottom:15px;
    right:-15%;
    background-image: url(http://www.html5tricks.com/demo/css3-sprite-zombie-walking/img/walkingdead.png);
    -webkit-animation: play 1.8s steps(10) infinite,zom 40s  linear infinite;
   /* -moz-animation: play 1.8s steps(10) infinite;
    -ms-animation: play 1.8s steps(10) infinite;
    -o-animation: play 1.8s steps(10) infinite;*/
    animation: play 1.8s steps(10) infinite,zom 40s  linear infinite;
    z-index:20;
}

@-webkit-keyframes zom
{
    from   {right:-15%;}
    to {right:110%;}
}

@-webkit-keyframes play {
    from { background-position:    0px; }
    to { background-position: -2000px; }
}


@-moz-keyframes play {
    from { background-position:    0px; }
    to { background-position: -2000px; }
}

@-ms-keyframes play {
    from { background-position:    0px; }
    to { background-position: -2000px; }
}

@-o-keyframes play {
    from { background-position:    0px; }
    to { background-position: -2000px; }
}

@keyframes play {
    from { background-position:    0px;  }
    to { background-position: -2000px;  }
}