JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="right_menu"><li><a href="#home_page">Home</a></li>
        <li><a href="#profile_about_me_friends">About Me</a></li>
        <li><a href="#profile_interests_content">Interest</a></li>
        <li><a href="#profile_photo_galleries">Gallery</a>
          <ul class="sub_menu"><li><a href="#profile_password_photo_galleries">Password</a>
          <ul class="sub_menu"><li><a href="#">Password</a>
        </li>
</ul></li>
          </ul></li>
        <li><a href="#profile_comments">Message Me</a></li>
</ul>

CSS

body {
  font-family:Verdana,Geneva,sans-serif;
  color:#FFF;
  font-size:12px;
  font-family:Trebuchet MS,Arial,Helvetica;
  background:url() no-repeat center 0,#000 url() left top;
  background-size:1670px 950px;
}

#header_bar,#profile_header,#profile_main_photo,#footer_bar {
  display:none;
  list-style-type:none;
}

#right_menu {
  position:fixed;
  font-size:15px;
  top:-80px;
  right:-55px;
  padding:50px;
  background-color:#FF00FF;
  width:-40%;
  height:110%;
  text-transform:uppercase;
}

#right_menu > li {
  text-align:center;
  display:block;
  padding:20px;
  height:16%;
  top:-10px;
  width:0;
  margin-bottom:0;
  text-transform:uppercase;
  position:relative;
  -webkit-transform:rotate(-90deg);
  -moz-transform:rotate(-90deg);
  -ms-transform:rotate(-90deg);
}

#right_menu li a {
  text-align:center;
  white-space:nowrap;
  display:block;
  padding:20px;
  position:fixed;
  text-transform:uppercase;
  text-decoration:none;
}

#right_menu > li:hover > a {
  background:#FF00FF;
  top:-1px;
}

#right_menu li:hover .sub_menu {
  display:block;
}

.sub_menu {
  display:none;
  position:relative;
  top:-80%;
  left:-338%;
  transform:translateX(-40%);
  width:auto;
  white-space:nowrap;
}

.sub_menu > li {
  display:inline-block;
}

.sub_menu li a {
  background:-webkit-linear-gradient(#77047e,#FF00FF);
  background:-o-linear-gradient(#77047e,#FF00FF);
  background:-moz-linear-gradient(#77047e,#FF00FF);
  background:linear-gradient(#77047e,#FF00FF);
}

.sub_menu li a:hover {
  background:#FF00FF;
  top:1em;
}