<div class="container">
  <div class="sign">
      <div class="neon-blue" id="title">4<span id="fade">0</span>4</div>
      <div class="neon-blue">страница не найдена<br>
       <span class="neon-purple" id="trav">Enter</span>
       <span class="neon-elov">Show</span></div>
   </div>
</div>
 <a href="http://entershow.ru/" target="_blank" class="button">На главную</a>

@import url("//fonts.googleapis.com/css?family=Nixie+One");
@import url("//fonts.googleapis.com/css?family=League+Script");
.container {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}
.sign {
  -ms-transform: rotate(-3deg);
  -webkit-transform: rotate(-3deg);
  transform: rotate(-3deg);
}
body {
  margin: 70px;
  background: #313131;
  font-family: 'Nixie One', Helvetica, Arial, sans-serif;
  font-size: 50px;
}
#title {
  font-size: 110px;
}
#trav {
  -webkit-animation: blink 0.01s infinite alternate;
  -moz-animation: blink 0.01s infinite alternate;
  -o-animation: blink 0.01s infinite alternate;
  animation: blink 0.01s infinite alternate;
}
#fade {
  opacity: 0.8;
  color: #ebffff;
  text-shadow: 2px 2px 1px rgba(0,0,0,0.3), 0 0px 15px #fff, 0 0 10px #38eeff, 0 0 50px #38eeff;
  -webkit-animation: fade 3s infinite alternate;
  -moz-animation: fade 3s infinite alternate;
  -o-animation: fade 3s infinite alternate;
  animation: fade 3s infinite alternate;
}
.neon-blue {
  margin: 0 auto;
  text-align: center;
  color: #ebffff;
  text-shadow: 2px 2px 1px rgba(0,0,0,0.3), 0 0px 15px #fff, 0 0 10px #38eeff, 0 0 50px #38eeff;
}
.neon-purple {
  font-family: 'League Script', Helvetica, Arial, sans-serif;
  font-size: 50px;
  margin: 0 auto;
  text-align: center;
  color: #ccf;
  text-shadow: 2px 2px 1px rgba(0,0,0,0.5), 0 0 20px #fff, 0 0 10px #ffffff, 0 0 50px #ffffff;
}
.neon-elov {
  font-family: 'League Script', Helvetica, Arial, sans-serif;
  font-size: 50px;
  margin: 0 auto;
  text-align: center;
  color: #ccf;
  text-shadow: 2px 2px 1px rgba(0,0,0,0.5), 0 0 20px #FFFF00, 0 0 10px #FFD700, 0 0 50px #FFD700;
}
@-moz-keyframes blink {
  70% {
    opacity: 0.7;
  }
}
@-webkit-keyframes blink {
  45% {
    opacity: 0.5;
  }
}
@-o-keyframes blink {
  70% {
    opacity: 0.7;
  }
}
@keyframes blink {
  70% {
    opacity: 0.7;
  }
}
@-moz-keyframes fade {
  40% {
    opacity: 0.8;
  }
  42% {
    opacity: 0.1;
  }
  43% {
    opacity: 0.8;
  }
  45% {
    opacity: 0.1;
  }
  46% {
    opacity: 0.8;
  }
}
@-webkit-keyframes fade {
  40% {
    opacity: 0.8;
  }
  42% {
    opacity: 0.1;
  }
  43% {
    opacity: 0.8;
  }
  45% {
    opacity: 0.1;
  }
  46% {
    opacity: 0.8;
  }
}
@-o-keyframes fade {
  40% {
    opacity: 0.8;
  }
  42% {
    opacity: 0.1;
  }
  43% {
    opacity: 0.8;
  }
  45% {
    opacity: 0.1;
  }
  46% {
    opacity: 0.8;
  }
}
@keyframes fade {
  40% {
    opacity: 0.8;
  }
  42% {
    opacity: 0.1;
  }
  43% {
    opacity: 0.8;
  }
  45% {
    opacity: 0.1;
  }
  46% {
    opacity: 0.8;
  }
}
.button {
  text-decoration: none;
  position: absolute; 
  left: 50%; 
  width: 800px;
  margin-left: -400px;
  cursor: pointer;
  font-family: 'League Script', Helvetica, Arial, sans-serif;
  font-size: 20px;
  display: inline-block;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  padding: 10px;
  border: none;
  color: rgba(255,255,255,1);
  text-decoration: normal;
  text-align: center;
  -o-text-overflow: clip;
  text-overflow: clip;
  white-space: pre;
  text-shadow: 0 0 10px rgba(255,255,255,1) , 0 0 20px rgba(255,255,255,1) , 0 0 30px rgba(255,255,255,1) , 0 0 40px #ff00de , 0 0 70px #ff00de , 0 0 80px #ff00de , 0 0 100px #ff00de ;
  -webkit-transition: all 200ms cubic-bezier(0.42, 0, 0.58, 1);
  -moz-transition: all 200ms cubic-bezier(0.42, 0, 0.58, 1);
  -o-transition: all 200ms cubic-bezier(0.42, 0, 0.58, 1);
  transition: all 200ms cubic-bezier(0.42, 0, 0.58, 1);
}
.button:hover {
  text-shadow: 0 0 10px rgba(255,255,255,1) , 0 0 20px rgba(255,255,255,1) , 0 0 30px rgba(255,255,255,1) , 0 0 40px #00ffff , 0 0 70px #00ffff , 0 0 80px #00ffff , 0 0 100px #00ffff ;
}