炫酷 Css3 loading 效果（二）

1.HTML
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<div id="loading-center">
    <div id="loading-center-absolute">
      <div class="object" id="object_four"></div>
      <div class="object" id="object_three"></div>
      <div class="object" id="object_two"></div>
      <div class="object" id="object_one"></div>
    </div>
</div>
2.CSS
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#loading-center-absolute {
  position: absolute;
  left: 50%;
  top: 50%;
  height: 200px;
  width: 200px;
  margin-top: -100px;
  margin-left: -100px;  
}
.object{
  -moz-border-radius: 50% 50% 50% 50%;
  -webkit-border-radius: 50% 50% 50% 50%;
  border-radius: 50% 50% 50% 50%;
  position: absolute;
  border-left: 5px solid #1c8a95;
  border-right: 5px solid #1c8a95;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  -webkit-animation: animate 2s infinite;
  animation: animate 2s infinite; 
}
#object_one{
  left: 75px;
  top: 75px;
  width: 50px;
  height: 50px;
}            
#object_two{
  left: 65px;
  top: 65px;
  width: 70px;
  height: 70px;
  -webkit-animation-delay: 0.1s;
  animation-delay: 0.1s;
}   
#object_three{
  left: 55px;
  top: 55px;
  width: 90px;
  height: 90px;
  -webkit-animation-delay: 0.2s;
  animation-delay: 0.2s;
}
#object_four{
  left: 45px;
  top: 45px;
  width: 110px;
  height: 110px;
  -webkit-animation-delay: 0.3s;
  animation-delay: 0.3s;
}
@-webkit-keyframes animate {
  50% {
    -ms-transform: rotate(180deg); 
    -webkit-transform: rotate(180deg); 
    transform: rotate(180deg); 
  }
  100% {
    -ms-transform: rotate(0deg); 
    -webkit-transform: rotate(0deg); 
    transform: rotate(0deg); 
  }   
}

@keyframes animate {
  50% {
    -ms-transform: rotate(180deg); 
    -webkit-transform: rotate(180deg); 
    transform: rotate(180deg); 
  }
  100% {
    -ms-transform: rotate(0deg); 
    -webkit-transform: rotate(0deg); 
    transform: rotate(0deg); 
  }  
}





-------------------------------------------




  #loading-center{
    width: 100%;
    height: 100%;
    position: relative;
  }
  #loading-center-absolute {
    position: absolute;
    left: 50%;
    top: 50%;
    height: 200px;
    width: 200px;
    margin-top: -100px;
    margin-left: -100px;
    -ms-transform: rotate(-135deg); 
    -webkit-transform: rotate(-135deg); 
    transform: rotate(-135deg);
  }
  .object{
    -moz-border-radius: 50% 50% 50% 50%;
    -webkit-border-radius: 50% 50% 50% 50%;
    border-radius: 50% 50% 50% 50%;
    position: absolute;
    border-top: 5px solid #1c8a95;
    border-bottom: 5px solid transparent;
    border-left:  5px solid #1c8a95;
    border-right: 5px solid transparent;
    -webkit-animation: animate 2s infinite;
    animation: animate 2s infinite; 
  }
  #object_one{
    left: 75px;
    top: 75px;
    width: 50px;
    height: 50px;
  }           
  #object_two{
    left: 65px;
    top: 65px;
    width: 70px;
    height: 70px;
    -webkit-animation-delay: 0.2s;
    animation-delay: 0.2s;
  } 
  #object_three{
    left: 55px;
    top: 55px;
    width: 90px;
    height: 90px;
    -webkit-animation-delay: 0.4s;
    animation-delay: 0.4s;
  }
  #object_four{
    left: 45px;
    top: 45px;
    width: 110px;
    height: 110px;
    -webkit-animation-delay: 0.6s;
    animation-delay: 0.6s;
  }