<marquee scrollamount="50" scrolldelay="5">
  <b>Dieser Text wird ziemlich schnell bewegt</b>
</marquee>

.myMarquee {
  width:600px;
  height:40px;
  overflow:hidden;
  position:relative;
}
.scroller {
  display:block;
  width:1240px;
  height:40px;
  position:absolute;
  left:0;
  top:0;
  -moz-animation-iteration-count: infinite;
  -moz-animation-timing-function: linear;
  -moz-animation-duration:10s;
  -moz-animation-name: scroll;
  -webkit-animation-iteration-count: infinite;
  -webkit-animation-timing-function: linear;
  -webkit-animation-duration:10s;
  -webkit-animation-name: scroll;
}
@-moz-keyframes scroll {
  0% {left:0;}
  100% {left:-620px;}
}
@-webkit-keyframes scroll {
  0% {left:0;}
  100% {left:-620px;}
}
.scroller:hover {
  -moz-animation-play-state: paused;
  -webkit-animation-play-state: paused;
}

<div class="myMarquee">
  <div class="scroller">
    <div>Ein sehr langer Text der durchscrollen soll.</div>
    <div>Und noch ein sehr langer Text der durchscrollen soll.</div>
  </div>
</div>