404 pages are used to redirect visitors to a page which shows that they are seeking for a wrong page or invalid address. However, it looks funny to add some effects to this page so maybe a smile is formed on the visitors face. This would for no doubt affect their performance in your site. The following code contains a funny ghost in the middle of the page. Its eyes rotate by moving the mouse and look at your pointer. It is simple and funny. Enjoy!


HTML
<!-- This script got from www.devanswer.com  -->
<div class="box">
<div class="box__ghost">
<div class="symbol"></div>
<div class="symbol"></div>
<div class="symbol"></div>
<div class="symbol"></div>
<div class="symbol"></div>
<div class="symbol"></div>
<div class="box__ghost-container">
<div class="box__ghost-eyes">
<div class="box__eye-left"></div>
<div class="box__eye-right"></div>
</div>
<div class="box__ghost-bottom">
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
</div>
</div>
<div class="box__ghost-shadow"></div>
</div>
<div class="box__description">
<div class="box__description-container">
<div class="box__description-title">Whoops!</div>
<div class="box__description-text">It seems like we couldn't find the page you were looking for</div>
</div>

</div>
</div>
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script><div id="bcl"><a style="font-size:8pt;text-decoration:none;" href="http://www.devanswer.com ">Developers Answer</a></div>
                        

CSS
@import url(https://fonts.googleapis.com/css?family=Ubuntu);
html, body {
  background: #28254C;
  font-family: 'Ubuntu';
}

* {
  box-sizing: border-box;
}

.box {
  width: 350px;
  height: 100%;
  max-height: 600px;
  min-height: 450px;
  background: #332F63;
  border-radius: 20px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  padding: 30px 50px;
}
.box .box__ghost {
  padding: 15px 25px 25px;
  position: absolute;
  left: 50%;
  top: 30%;
  transform: translate(-50%, -30%);
}
.box .box__ghost .symbol:nth-child(1) {
  opacity: .2;
  animation: shine 4s ease-in-out 3s infinite;
}
.box .box__ghost .symbol:nth-child(1):before, .box .box__ghost .symbol:nth-child(1):after {
  content: '';
  width: 12px;
  height: 4px;
  background: #fff;
  position: absolute;
  border-radius: 5px;
  bottom: 65px;
  left: 0;
}
.box .box__ghost .symbol:nth-child(1):before {
  transform: rotate(45deg);
}
.box .box__ghost .symbol:nth-child(1):after {
  transform: rotate(-45deg);
}
.box .box__ghost .symbol:nth-child(2) {
  position: absolute;
  left: -5px;
  top: 30px;
  height: 18px;
  width: 18px;
  border: 4px solid;
  border-radius: 50%;
  border-color: #fff;
  opacity: .2;
  animation: shine 4s ease-in-out 1.3s infinite;
}
.box .box__ghost .symbol:nth-child(3) {
  opacity: .2;
  animation: shine 3s ease-in-out .5s infinite;
}
.box .box__ghost .symbol:nth-child(3):before, .box .box__ghost .symbol:nth-child(3):after {
  content: '';
  width: 12px;
  height: 4px;
  background: #fff;
  position: absolute;
  border-radius: 5px;
  top: 5px;
  left: 40px;
}
.box .box__ghost .symbol:nth-child(3):before {
  transform: rotate(90deg);
}
.box .box__ghost .symbol:nth-child(3):after {
  transform: rotate(180deg);
}
.box .box__ghost .symbol:nth-child(4) {
  opacity: .2;
  animation: shine 6s ease-in-out 1.6s infinite;
}
.box .box__ghost .symbol:nth-child(4):before, .box .box__ghost .symbol:nth-child(4):after {
  content: '';
  width: 15px;
  height: 4px;
  background: #fff;
  position: absolute;
  border-radius: 5px;
  top: 10px;
  right: 30px;
}
.box .box__ghost .symbol:nth-child(4):before {
  transform: rotate(45deg);
}
.box .box__ghost .symbol:nth-child(4):after {
  transform: rotate(-45deg);
}
.box .box__ghost .symbol:nth-child(5) {
  position: absolute;
  right: 5px;
  top: 40px;
  height: 12px;
  width: 12px;
  border: 3px solid;
  border-radius: 50%;
  border-color: #fff;
  opacity: .2;
  animation: shine 1.7s ease-in-out 7s infinite;
}
.box .box__ghost .symbol:nth-child(6) {
  opacity: .2;
  animation: shine 2s ease-in-out 6s infinite;
}
.box .box__ghost .symbol:nth-child(6):before, .box .box__ghost .symbol:nth-child(6):after {
  content: '';
  width: 15px;
  height: 4px;
  background: #fff;
  position: absolute;
  border-radius: 5px;
  bottom: 65px;
  right: -5px;
}
.box .box__ghost .symbol:nth-child(6):before {
  transform: rotate(90deg);
}
.box .box__ghost .symbol:nth-child(6):after {
  transform: rotate(180deg);
}
.box .box__ghost .box__ghost-container {
  background: #fff;
  width: 100px;
  height: 100px;
  border-radius: 100px 100px 0 0;
  position: relative;
  margin: 0 auto;
  animation: upndown 3s ease-in-out infinite;
}
.box .box__ghost .box__ghost-container .box__ghost-eyes {
  position: absolute;
  left: 50%;
  top: 45%;
  height: 12px;
  width: 70px;
}
.box .box__ghost .box__ghost-container .box__ghost-eyes .box__eye-left {
  width: 12px;
  height: 12px;
  background: #332F63;
  border-radius: 50%;
  margin: 0 10px;
  position: absolute;
  left: 0;
}
.box .box__ghost .box__ghost-container .box__ghost-eyes .box__eye-right {
  width: 12px;
  height: 12px;
  background: #332F63;
  border-radius: 50%;
  margin: 0 10px;
  position: absolute;
  right: 0;
}
.box .box__ghost .box__ghost-container .box__ghost-bottom {
  display: flex;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
}
.box .box__ghost .box__ghost-container .box__ghost-bottom div {
  flex-grow: 1;
  position: relative;
  top: -10px;
  height: 20px;
  border-radius: 100%;
  background-color: #fff;
}
.box .box__ghost .box__ghost-container .box__ghost-bottom div:nth-child(2n) {
  top: -12px;
  margin: 0 -0px;
  border-top: 15px solid #332F63;
  background: transparent;
}
.box .box__ghost .box__ghost-shadow {
  height: 20px;
  box-shadow: 0 50px 15px 5px #3B3769;
  border-radius: 50%;
  margin: 0 auto;
  animation: smallnbig 3s ease-in-out infinite;
}
.box .box__description {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
}
.box .box__description .box__description-container {
  color: #fff;
  text-align: center;
  width: 200px;
  font-size: 16px;
  margin: 0 auto;
}
.box .box__description .box__description-container .box__description-title {
  font-size: 24px;
  letter-spacing: .5px;
}
.box .box__description .box__description-container .box__description-text {
  color: #8C8AA7;
  line-height: 20px;
  margin-top: 20px;
}
.box .box__description .box__button {
  display: block;
  position: relative;
  background: #FF5E65;
  border: 1px solid transparent;
  border-radius: 50px;
  height: 50px;
  text-align: center;
  text-decoration: none;
  color: #fff;
  line-height: 50px;
  font-size: 18px;
  padding: 0 70px;
  white-space: nowrap;
  margin-top: 25px;
  transition: background .5s ease;
  overflow: hidden;
}
.box .box__description .box__button:before {
  content: '';
  position: absolute;
  width: 20px;
  height: 100px;
  background: #fff;
  bottom: -25px;
  left: 0;
  border: 2px solid #fff;
  transform: translateX(-50px) rotate(45deg);
  transition: transform .5s ease;
}
.box .box__description .box__button:hover {
  background: transparent;
  border-color: #fff;
}
.box .box__description .box__button:hover:before {
  transform: translateX(250px) rotate(45deg);
}

@keyframes upndown {
  0% {
    transform: translateY(5px);
  }
  50% {
    transform: translateY(15px);
  }
  100% {
    transform: translateY(5px);
  }
}
@keyframes smallnbig {
  0% {
    width: 90px;
  }
  50% {
    width: 100px;
  }
  100% {
    width: 90px;
  }
}
@keyframes shine {
  0% {
    opacity: .2;
  }
  25% {
    opacity: .1;
  }
  50% {
    opacity: .2;
  }
  100% {
    opacity: .2;
  }
}
Javascript
var pageX = $(document).width();
var pageY = $(document).height();
var mouseY = 0;
var mouseX = 0;

$(document).mousemove(function (event) {
  //verticalAxis
  mouseY = event.pageY;
  yAxis = (pageY / 2 - mouseY) / pageY * 300;
  //horizontalAxis
  mouseX = event.pageX / -pageX;
  xAxis = -mouseX * 100 - 100;

  $('.box__ghost-eyes').css({ 'transform': 'translate(' + xAxis + '%,-' + yAxis + '%)' });

});