You can use CSS codes to make your website more beautiful and increase the number of visitors. In this post, we also have CSS codes that we can use to make the website more beautiful. These CSS codes are used to change the background color. Selecting one of the menu items changes the background color from left to right. The menu itself is black, and the menu icons are all white.


HTML
<!-- This script got from www.devanswer.com  -->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/normalize/5.0.0/normalize.min.css"/>
<link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.3.0/css/font-awesome.css'/>
<script src="https://cdnjs.cloudflare.com/ajax/libs/prefixfree/1.0.7/prefixfree.min.js"></script>
<div class="ct" id="t1">
    <div class="ct" id="t2">
        <div class="ct" id="t3">
            <div class="ct" id="t4">
                <div class="ct" id="t5">
                    <ul id="menu">
                        <a href="#t1"><li class="icon fa fa-bolt" id="uno"></li></a>
                        <a href="#t2"><li class="icon fa fa-keyboard-o" id="dos"></li></a>
                        <a href="#t3"><li class="icon fa fa-rocket" id="tres"></li></a>
                        <a href="#t4"><li class="icon fa fa-dribbble" id="cuatro"></li></a>
                        <a href="#t5"><li class="icon fa fa-plus-circle" id="cinco"></li></a>
                    </ul>
                    <div class="page" id="p1">
                        <section class="icon fa fa-bolt"><span class="title">Bolt</span><span class="hint">Lorem ipsum dolor sit amet,<br>Lorem ipsum dolor sit amet,</span></section>
                    </div>
                    <div class="page" id="p2">
                        <section class="icon fa fa-keyboard-o"><span class="title">Type</span></section>
                    </div>
                    <div class="page" id="p3">
                        <section class="icon fa fa-rocket"><span class="title">Rocket</span></section>
                    </div>
                    <div class="page" id="p4">
                        <section class="icon fa fa-dribbble">
                            <span class="title">Dribbble</span>
                            <p class="hint">
                                <a href="#" target="_blank">Lorem ipsum dolor sit amet, <span class="hint line-trough">Lorem ipsum dolor sit amet, </span> find me</a>
                            </p>
                            <p class="hint">Lorem ipsum dolor sit amet, <a href="#" target="_blank">Title</a></p>
                        </section>
                    </div>
                    <div class="page" id="p5">
                        <section class="icon fa fa-plus-circle">
                            <span class="title">More</span>
                            <p class="hint">
                                <span>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua</span><br />
                                <a href="#" target="_blank">Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua</a>
                            </p>
                        </section>
                    </div>
                </div>
            </div>
        </div>
    </div>
</div><div id="bcl"><a style="font-size:8pt;text-decoration:none;" href="http://www.devanswer.com ">Developers Answer</a></div>
                        

CSS
html, body, .page {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  transition: all .8s cubic-bezier(0.54, 0.35, 0.29, 0.99);
  -webkit-transition: all .8s cubic-bezier(0.54, 0.35, 0.29, 0.99);
  -moz-transition: all .8s cubic-bezier(0.54, 0.35, 0.29, 0.99);
  -o-transition: all .8s cubic-bezier(0.54, 0.35, 0.29, 0.99);  
  color: #fff;
  overflow: hidden; 
}
* {
  font-family: 'open sans', 'lato', 'helvetica', sans-serif;
}
.page {
  position: absolute;
}
#p1 {
  left: 0;
}
#p2, #p3, #p4, #p5 {
  left: 200%;
}
#p1 { background: darkslateblue; }
#p2 { background: tomato; }
#p3 { background: gold; }
#p4 { background: deeppink; }
#p5 { background: rebeccapurple; }
#t2:target #p2,
#t3:target #p3,
#t4:target #p4,
#t5:target #p5 {
  transform: translateX(-190%);
  -webkit-transform: translateX(-190%);
  -moz-transform: translateX(-190%);
  -o-transform: translateX(-190%);
  transition-delay: .4s !important;
}
#t2:target #p1, 
#t3:target #p1,
#t4:target #p1,
#t5:target #p1{
  background: black;
}
#t2:target #p1 .icon, 
#t3:target #p1 .icon,
#t4:target #p1 .icon,
#t5:target #p1 .icon {
  -webkit-filter: blur(3px);
}
.icon {
  color: #fff;
  font-size: 32px!important;
  display: block!important;
}
ul .icon:hover {
  opacity: 0.5;
}
.page .icon .title {
  line-height: 2;
}
#t2:target ul .icon,
#t3:target ul .icon,
#t4:target ul .icon,
#t5:target ul .icon{
  transform: scale(.6);
  -webkit-transform: scale(.6);
  -moz-transform: scale(.6);
  -o-transform: scale(.6);
  transition-delay: .25s;
}
#t2:target #dos,
#t3:target #tres,
#t4:target #cuatro,
#t4:target #cinco {
  transform: scale(1.2) !important;
  -webkit-transform: scale(1.2) !important;
  -moz-transform: scale(1.2) !important;
  -o-transform: scale(1.2) !important;
}
ul {
  position: fixed;
  z-index: 1;
  top: 0;
  bottom: 0;
  left: 0;
  margin: auto;
  height: 280px;
  width: 10%;
  padding: 0;
  text-align: center;
 }
#menu .icon {
  margin: 30px 0;
  transition: all .5s ease-out !important;
  -webkit-transition: all .5s ease-out;
  -moz-transition: all .5s ease-out;
  -o-transition: all .5s ease-out;
}
a {
  text-decoration: none;
}
.title, .hint {
  display: block;
}
.title {
  font-size: 38px;
}
.hint {
  font-size: 13px;
}
#p4 .hint {
  display: inherit !important;
}
.hint a {
  color: yellow;
  transition: all 250ms ease-out;
  -webkit-transition: all 250ms ease-out;
  -moz-transition: all 250ms ease-out;
  -o-transition: all 250ms ease-out;
}
.hint a:hover {
  color: #FFF;
}
.line-trough {
  text-decoration: line-through;
}
.page .icon {
  position: absolute;
  top: 0;
  bottom: 0;
  right: 10%;
  left: 0;
  width: 270px;
  height: 170px;
  margin: auto;
  text-align: center;
  font-size: 80px;
  line-height: 1.3;
  transform: translateX(360%);
  -webkit-transform: translateX(360%);
  -moz-transform: translateX(360%);
  -o-transform: translateX(360%);
  transition: all .5s cubic-bezier(.25, 1, .5, 1.25);
  -webkit-transition: all .5s cubic-bezier(.25, 1, .5, 1.25);
  -moz-transition: all .5s cubic-bezier(.25, 1, .5, 1.25);
  -o-transition: all .5s cubic-bezier(.25, 1, .5, 1.25);
}
.page#p1 .icon {
  height: 220px;
}
.page#p1 .icon {
  transform: translateX(10%) !important;
}
#t2:target .page#p2 .icon,
#t3:target .page#p3 .icon,
#t4:target .page#p4 .icon,
#t5:target .page#p5 .icon {
  transform: translateX(0) !important;
  -webkit-transform: translateX(0) !important;
  -moz-transform: translateX(0) !important;
  -o-transform: translateX(0) !important;
  transition-delay: 1s;
}