How to create text rotate animation (spin) using css3

h1{
color: #fff;
font-size: 44px;
margin-top: 40px;
text-align: center;
}
/
.sentence{
     color: #222;
     font-size: 30px;
     text-align: left;
}

/*ClockWise Effect*/
.clockWise{
display: inline;
text-indent: 8px;
}
.clockWise span{
animation: clock 12.5s linear infinite 0s;
-ms-animation: clock 12.5s linear infinite 0s;
-webkit-animation: clock 12.5s linear infinite 0s;
color: #FF9800;
opacity: 0;
overflow: hidden;
position: absolute;
}
.clockWise span:nth-child(2){
animation-delay: 2.5s;
-ms-animation-delay: 2.5s;
-webkit-animation-delay: 2.5s;
}
.clockWise span:nth-child(3){
animation-delay: 5s;
-ms-animation-delay: 5s;
-webkit-animation-delay: 5s;
}
.clockWise span:nth-child(4){
animation-delay: 7.5s;
-ms-animation-delay: 7.5s;
-webkit-animation-delay: 7.5s;
}
.clockWise span:nth-child(5){
animation-delay: 10s;
-ms-animation-delay: 10s;
-webkit-animation-delay: 10s;
}

/*ClockWise Effect Animation*/
@-moz-keyframes clock{
0% { opacity: 0; }
5% { opacity: 0; -moz-transform: rotate(-180deg); }
10% { opacity: 1; -moz-transform: translateX(0px); }
25% { opacity: 1; -moz-transform: translateX(0px); }
30% { opacity: 0; -moz-transform: translateX(0px); }
80% { opacity: 0; }
100% { opacity: 0;}
}
@-webkit-keyframes clock{
0% { opacity: 0; }
5% { opacity: 0; -webkit-transform: rotate(-180deg); }
10% { opacity: 1; -webkit-transform: translateX(0px); }
25% { opacity: 1; -webkit-transform: translateX(0px); }
30% { opacity: 0; -webkit-transform: translateX(0px); }
80% { opacity: 0; }
100% { opacity: 0; }
}
@-ms-keyframes clock{
0% { opacity: 0; }
5% { opacity: 0; -ms-transform: rotate(-180deg); }
10% { opacity: 1; -ms-transform: translateX(0px); }
25% { opacity: 1; -ms-transform: translateX(0px); }
30% { opacity: 0; -ms-transform: translateX(0px); }
80% { opacity: 0; }
100% { opacity: 0; }
}

<section class=”wrapper” style=”width:400px; margin-left:auto; margin-right:auto; margin-top:60px;”>
  <h2 class=”sentence”>Our Services are
    <div class=”clockWise”>
      <span>Web Designing.</span>
      <span>Web Development.</span>
      <span>SEO.</span>
      <span>Digital Marketing.</span>
      <span>SEM.</span>
    </div>
<h5 style=”text-align:right;”><a href=”http://www.sanwebcorner.com”>san web corner</a></h5>
  </h2>
</section>