.contenedor {
  
width: 370px;
height: 40px;
 color: #fff;
  font-size: 28px;
  font-family: sans-serif;
  
line-height:  40px;
display: flex;
position: absolute;
  
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
 overflow: hidden;
}
   .contenedor:before {
      content: '[';
      left: 0;
    }

    .contenedor:after {
      content: ']';
      position: absolute;
      right: 0;
    }

    .contenedor:after, .contenedor:before {
      position: absolute;
      top: 0px;
      
      color: darkorange;
      font-size: 40px;
      line-height: 40px;
      
       -webkit-animation-name: opacity;
      -webkit-animation-duration: 1s;
      -webkit-animation-iteration-count: infinite;
      animation-name: opacity;
      animation-duration: 1.5s;
      animation-iteration-count: infinite;
    }
  
  


 .contenedor ul {
  
  list-style: none;
 margin: 0px;
  animation: cambiar 18s infinite;
  text-align: center;
    padding: 5px 20px;
}

@keyframes cambiar {
  0%{margin-top: 0;}
2%{margin-top: 0;}
   
7%{margin-top: -40px;}
9%{margin-top: -40px;} 
  
  14%{margin-top: -80px;}
 16%{margin-top: -80px;}
  
   21%{margin-top: -120px;}
  23%{margin-top: -120px;} 
  
    28%{margin-top: -160px;}
  30%{margin-top: -160px;} 
  
      37%{margin-top: -200px;}
  39%{margin-top: -200px;} 
  
        44%{margin-top: -240px;}
  46%{margin-top: -240px;} 
  
  
        51%{margin-top: -280px;}
  52%{margin-top: -280px;} 
  
  

  
  /* Return*/
  
 
  
      57%{margin-top: -240px;}
  59%{margin-top: -240px;} 
       
  64%{margin-top: -200px;}
  66%{margin-top: -200px;} 


   71%{margin-top: -160px;}
  72%{margin-top: -160px;} 
  
     77%{margin-top: -120px;}
  79%{margin-top: -120px;} 
  
    84%{margin-top: -80px;}
  86%{margin-top: -80px;}
  
  90%{margin-top: -40px;}
92%{margin-top: -40px;} 
  
    94%{margin-top: 0;}
100%{margin-top: 0;}
   

  

  } 

@keyframes opacity {
  0%, 100% {opacity:0;}
  50% {opacity:1;}
}

@keyframes change {
  0%, 12.66%, 100% {transform:translate3d(0,0,0);}
  16.66%, 29.32% {transform:translate3d(0,-25%,0);}
  33.32%,45.98% {transform:translate3d(0,-50%,0);}
  49.98%,62.64% {transform:translate3d(0,-75%,0);}
  66.64%,79.3% {transform:translate3d(0,-50%,0);}
  83.3%,95.96% {transform:translate3d(0,-25%,0);}
}