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HTML 

              
                <div class="contenedor">
<div class="bici">
  <span class="shadow"></span>
  <span class="shadow3"></span>
  <span class="rueda1"><span class="rayos"></span><span class="rayos3"></span></span>
  <span class="ruedita"></span>
   <span class="rueda2"><span class="rayos"></span><span class="rayos3"></span></span>
   <span class="ruedita3"></span>
  <span class="t2"></span>
  <span class="t4"></span>
  <span class="t5"></span>
  <span class="rot3"></span>
  
  <span class="cuadrado"></span>
  <span class="redon"></span>
  <span class="redon3"></span>
  <span class="t1"></span>
  <span class="t3"></span>
  
  <span class="asiento"></span>
  <span class="circ"></span>
  <span class="rot"></span>
  </div>
<div class="nube">
<div class="nubes"></div>
  <div class="nubes3"></div>
  <div class="nubes7"></div>
  <div class="nubes9"></div>
  <div class="nubes12"></div>
  </div>
</div>
!

CSS 

              
                body{
  background:black;
}

.contenedor{
  position:relative;
  width:800px;
  height:600px;
 background: rgb(199,233,239); 
background: -moz-linear-gradient(top,  rgba(199,233,239,1) 0%, rgba(199,233,239,1) 70%, rgba(234,227,173,1) 70%, rgba(199,233,239,1) 70%, rgba(234,227,173,1) 70%, rgba(234,227,173,1) 100%); 
background: -webkit-linear-gradient(top,  rgba(199,233,239,1) 0%,rgba(199,233,239,1) 70%,rgba(234,227,173,1) 70%,rgba(199,233,239,1) 70%,rgba(234,227,173,1) 70%,rgba(234,227,173,1) 100%); 
background: linear-gradient(to bottom,  rgba(199,233,239,1) 0%,rgba(199,233,239,1) 70%,rgba(234,227,173,1) 70%,rgba(199,233,239,1) 70%,rgba(234,227,173,1) 70%,rgba(234,227,173,1) 100%); 
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#c7e9ef', endColorstr='#eae3ad',GradientType=0 ); 
margin:212px auto;
  border:9px solid #ddd;
  overflow:hidden;
}
.bici{
  position:absolute;
  margin:0 70px
}
.rueda1{
  position:absolute;
  width:152px;
  height:152px;
  border-radius:100%;
  border:7px solid #CAA659;
  margin:330px 121px;
  animation:rodar 3s linear infinite;
  -moz-animation:rodar 3s linear infinite;
  -webkit-animation:rodar 3s linear infinite;
  
  
}
.rueda1::before,.rueda2::before{
  content:"";
  position:absolute;
  width:162px;
  height:162px;
  border-radius:100%;
  border:7px solid #813262;
  margin:-12px -12px;
}
.ruedita{
  
  position:absolute;
  width:172px;
  height:85px;
  border-radius:172px 172px 0 0;
  border-top:9px solid #F65083;
   border-left:9px solid #F65083;
   border-right:9px solid #F65083;
  margin:316px 109px;
}
.ruedita3{
  
  position:absolute;
  width:172px;
  height:85px;
  border-radius:172px 172px 0 0;
  border-top:9px solid #F65083;
   border-left:9px solid #F65083;
   border-right:9px solid #F65083;
  margin:316px 378px;
}
.rayos{
  position:absolute;
  width:3px;
  height:152px;
  background:#CAA659;
  margin:0 75px;
}
.rayos::before{
  content:"";
  position:absolute;
  width:152px;
  height:3px;
  background:#CAA659;
  margin:75px -75px;
}
.rayos::after{
  content:"";
  position:absolute;
  width:152px;
  height:3px;
  background:#CAA659;
  margin:75px -75px;
  transform:rotate(-45deg);
  -moz-transform:rotate(-45deg);
}
.rayos3{
  
  position:absolute;
  width:152px;
  height:3px;
  background:#CAA659;
  margin:75px 0px;
  transform:rotate(45deg);
  -moz-transform:rotate(45deg);
  -webkit-transform:rotate(45deg);
}
.rueda2{
  position:absolute;
  width:152px;
  height:152px;
  border-radius:100%;
  border:7px solid #CAA659;
  margin:330px 390px;
   animation:rodar 3s linear infinite;
  -moz-animation:rodar 3s linear infinite;
  -webkit-animation:rodar 3s linear infinite;
  
}
.cuadrado{
  position:absolute;
  width:50px;
  height:50px;
  border-radius:100%;
  background:#78C795;
  margin:390px 180px;
}

.cuadrado::before{
  content:"";
  position:absolute;
  width:60px;
  height:60px;
  border-radius:100%;
  background:#78C795;
  margin:-7px 121px;
}
.cuadrado::after{
  content:"";
  position:absolute;
   border-top: 121px solid #78C795;
  border-left: 12px solid transparent;
  border-right: 12px solid transparent;
  height: 0;
  width: 30px;
  transform:rotate(90deg);
  -moz-transform:rotate(90deg);
  -webkit-transform:rotate(90deg);
  margin:-36px 60px
}
.redon{
  position:absolute;
  width:30px;
  height:30px;
  border-radius:100%;
  background:#F65083;
  margin:400px 189px
}

.t1{
  position:absolute;
  width:5px;
  height:152px;
  border-radius:6px;
  background:#CEEBD7;
  border:3px solid #78C795;
    margin:275px 241px;
  transform:rotate(35deg);
  -moz-transform:rotate(35deg);
  -webkit-transform:rotate(35deg);
}
.t2{
  position:absolute;
  width:5px;
  height:192px;
  border-radius:6px;
  background:#CEEBD7;
  border:3px solid #78C795;
    margin:231px 300px;
  transform:rotate(-21deg);
  -moz-transform:rotate(-21deg);
  -webkit-transform:rotate(-21deg);
}
.t3{
  position:absolute;
  width:5px;
  height:132px;
  border-radius:6px;
  background:#CEEBD7;
  border:3px solid #78C795;
    margin:221px 350px;
  transform:rotate(-112deg);
  -moz-transform:rotate(-112deg);
  -webkit-transform:rotate(-112deg);
}
.t4{
  position:absolute;
  width:5px;
  height:231px;
  border-radius:6px;
  background:#CEEBD7;
  border:3px solid #78C795;
    margin:192px 430px;
  transform:rotate(-21deg);
  -moz-transform:rotate(-21deg);
  -webkit-transform:rotate(-21deg);
}
.t5{
  position:absolute;
  width:5px;
  height:132px;
  border-radius:6px;
  background:#CEEBD7;
  border:3px solid #78C795;
    margin:261px 370px;
  transform:rotate(45deg);
  -moz-transform:rotate(45deg);
  -webkit-transform:rotate(45deg);
}
.redon3{
  position:absolute;
  width:30px;
  height:30px;
  border-radius:100%;
  background:#F65083;
  margin:400px 460px
}
.circ{
  position:absolute;
  width:60px;
  height:30px;
  border-radius:70px 70px 0 0;
  border-top:9px solid #F66CAE;
  border-left:9px solid #F66CAE;
  border-right:12px solid #F66CAE;
  margin:172px 321px
}
.asiento{
  position:absolute;
  width:70px;
  height:21px;
  border-radius:30px;
  background:#F66CAE;
  border:3px solid #F65083;
  margin:231px 235px
}
.rot{
  
  position:absolute;
  width:21px;
  height:21px;
  border-radius:100%;
  background:#F66CAE;
  margin:390px 309px;
  border:12px solid #F65083;
  animation:rodar 3s linear infinite;
  -moz-animation:rodar 3s linear infinite;
  -webkit-animation:rodar 3s linear infinite;
}
.rot::before{
  content:"";
  position:absolute;
  width:7px;
  height:60px;
  background:#83385D;
  margin:5px 17px;
   transform:rotate(-21deg);
  -moz-transform:rotate(-21deg);
  -webkit-transform:rotate(-21deg);
}
.rot::after{
  content:"";
  display:block;
  width:40px;
  height:12px;
  border-radius:21px;
  background:#78C795;
  border-top:6px solid #50AD78;
  margin:59px 12px
}

.rot3{
  
  position:absolute;
  width:7px;
  height:60px;
  background:#83385D;
  margin:330px 321px;
  transform-origin:50% 100%;
   -moz-transform-origin:50% 100%;
   -webkit-transform-origin:50% 100%;
   -webkit-transform:rotate(152deg);
  -moz-transform:rotate(152deg);
  -webkit-transform:rotate(152deg);
  animation:rodar 3s linear infinite;
  -moz-animation:rodar 3s linear infinite;
  -webkit-animation:rodar 3s linear infinite;
}
.rot3::before{
  content:"";
  display:block;
  width:40px;
  height:12px;
  border-radius:21px;
  background:#78C795;
  border-top:6px solid #50AD78;
  margin:-0px -14px;
}

.nubes,.nubes3,.nubes7,.nubes9,.nubes12{
  position:absolute;
  width:50px;
  height:50px;
  border-radius:100%;
  background:white;
  
  border:1px solid #333;
    
}
.nubes{
  margin:90px 800px;
  animation:go 9s linear infinite;
  -moz-animation:go 9s linear infinite;
  -webkit-animation:go 9s linear infinite;
  
}
.nubes3{
  margin:30px 172px;
  transform:scale(.7);
  -moz-transform:scale(.7);
  -webkit-transform:scale(.7);
   animation:go3 12s linear infinite;
  -moz-animation:go3 12s linear infinite;
  -webkit-animation:go3 12s linear infinite;
}
.nubes7{
  margin:50px 330px;
  transform:scale(.9);
  -moz-transform:scale(.9);
  -webkit-transform:scale(.9);
  animation:go7 16s linear infinite;
  -moz-animation:go7 16s linear infinite;
  -webkit-animation:go7 16s linear infinite;
  
}
.nubes9{
  margin:70px 530px;
  transform:scale(.5);
  -moz-transform:scale(.5);
  -webkit-transform:scale(.5);
  animation:go9 19s linear infinite;
  -moz-animation:go9 19s linear infinite;
  -webkit-animation:go9 19s linear infinite;
}

.nubes12{
  margin:40px 700px;
  transform:scale(.7);
  -moz-transform:scale(.7);
  -webkit-transform:scale(.7);
   animation:go12 21s linear infinite;
  -moz-animation:go12 21s linear infinite;
  -webkit-animation:go12 21s linear infinite;
  
}
.nubes::before, .nubes3::before,.nubes7::before,.nubes9::before,.nubes12::before{
  content:"";
  position:absolute;
  width:60px;
  height:60px;
  border-radius:100%;
  background:white;
  margin:-9px 21px;
    border-top:1px solid #333; 
    border-bottom:1px solid #333; 
}
.nubes::after,.nubes3::after,.nubes7::after, .nubes9::after,.nubes12::after{
  content:"";
  position:absolute;
  width:45px;
  height:45px;
  border-radius:100%;
  background:white;
  margin:0px 53px;
    border-top:1px solid #333; 
    border-right:1px solid #333; 
}

.shadow, .shadow3{
  position:absolute;
  width:201px;
  height:30px;
  border-radius:100%;
  background:#C3B895;
  
   animation:grow 3s alternate infinite;
  -moz-animation:grow 3s alternate infinite;
  -webkit-animation:grow 3s alternate infinite;
}
.shadow{
  margin:480px 102px;}
.shadow3{
  margin:480px 380px}

@keyframes rodar{
  0%{transform:rotate(0deg);
  -moz-transform:rotate(0deg);
  -webkit-transform:rotate(0deg);}
  100%{transform:rotate(360deg);
  -moz-transform:rotate(360deg);
  -webkit-transform:rotate(360deg);}
}
@-moz-keyframes rodar{
  0%{transform:rotate(0deg);
  -moz-transform:rotate(0deg);
  -webkit-transform:rotate(0deg);}
  100%{transform:rotate(360deg);
  -moz-transform:rotate(360deg);
  -webkit-transform:rotate(360deg);}
}
@-webkit-keyframes rodar{
  0%{transform:rotate(0deg);
  -moz-transform:rotate(0deg);
  -webkit-transform:rotate(0deg);}
  100%{transform:rotate(360deg);
  -moz-transform:rotate(360deg);
  -webkit-transform:rotate(360deg);}
}
@keyframes go{
  0%{ margin:90px 800px;}
  100%{ margin:90px -90px;}
  
}
@-moz-keyframes go{
  0%{ margin:90px 800px;}
  100%{ margin:90px -90px;}
  
}
@-webkit-keyframes go{
  0%{ margin:90px 800px;}
  100%{ margin:90px -90px;}
  
}

@keyframes go3{
  0%{ margin:50px 900px;}
  100%{ margin:50px -90px;}
  }
@-moz-keyframes go3{
  0%{ margin:50px 900px;}
  100%{ margin:50px -90px;}
  }
@-webkit-keyframes go3{
  0%{ margin:50px 900px;}
  100%{ margin:50px -90px;}
  }

@keyframes go7{
  0%{ margin:50px 990px;}
  100%{ margin:50px -90px;}
 }
@-moz-keyframes go7{
  0%{ margin:50px 990px;}
  100%{ margin:50px -90px;}
 }
@-webkit-keyframes go7{
  0%{ margin:50px 990px;}
  100%{ margin:50px -90px;}
 }

@keyframes go9{
  0%{ margin:70px 1012px;}
  100%{ margin:70px -90px;}
 }
@-moz-keyframes go9{
  0%{ margin:70px 1012px;}
  100%{ margin:70px -90px;}
 }
@-webkit-keyframes go9{
  0%{ margin:70px 1012px;}
  100%{ margin:70px -90px;}
 }

@keyframes go12{
  0%{ margin:40px 1072px;}
  100%{ margin:40px -90px;}
  }
@-moz-keyframes go12{
  0%{ margin:40px 1072px;}
  100%{ margin:40px -90px;}
  }
@-webkit-keyframes go12{
  0%{ margin:40px 1072px;}
  100%{ margin:40px -90px;}
  }

@-moz-keyframes grow{
  0%{transform:scale(1);
  -moz-transform:scale(1);
  -webkit-transform:scale(1);}
  100%{transform:scale(.8);
  -moz-transform:scale(.8);
  -webkit-transform:scale(.8);}
   }
@-webkit-keyframes grow{
  0%{transform:scale(1);
  -moz-transform:scale(1);
  -webkit-transform:scale(1);}
  100%{transform:scale(.8);
  -moz-transform:scale(.8);
  -webkit-transform:scale(.8);}
   }
@keyframes grow{
  0%{transform:scale(1);
  -moz-transform:scale(1);
  -webkit-transform:scale(1);}
  100%{transform:scale(.8);
  -moz-transform:scale(.8);
  -webkit-transform:scale(.8);}
   }
!

JS
!
999px

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