<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <div> <ul class="nav"> <li><a href="#">Home</a></li> <li><a href="#">Mobile</a> <ul class ="sub"> <li><a href="#">Lenovo</a></li> <li><a href="#">Nokia</a></li> <li><a href="#">LAVA</a></li> </ul> </li> <li><a href="#">Laptop</a> <ul class ="sub"> <li><a href="#">HP</a></li> <li><a href="#">Dell</a></li> <li><a href="#">Lenovo</a></li> </ul> </li> <li><a href="#">Fridge</a> <ul class ="sub"> <li><a href="#">LG</a></li> <li><a href="#">samsung</a></li> <li><a href="#">Kelvinator</a></li> </ul> </li> <li><a href="#">Contact Us</a></li> <li><a href="#">About Us</a></li> </ul> </div> </div> </div>

.nav,.nav ul { margin:0px; padding :0px; list-style :none outside none; height:30px; } .nav li { float :left; width:150px; position:relative; height:50px; background:#cc101c; display:block; box-shadow:10px 0px 10px 0px; margin-left:2px; } .nav a { text-decoration :none; height:50px; display:block ; text-align :center ; color:white; padding-top:10px; } .sub { left:-9999px; position :absolute ; top:-9999px; z-index :2; } .nav li:hover .sub { visibility:visible ; } .nav { font-family :Calibri; font-size :20px; height:50px; font-weight:bold; margin:40px auto; text-shadow :0 -1px 3px #ffcc00; border-radius:4px; } .nav li:first-child { border-left :0 none; margin-left :5px; } .nav li a { color:White ; display :block; line-height :24px; text-decoration :none; } @keyframes ss { 0% { transform:scale(1); } 30% { transform:scale(1.3); } 100% { transform:scale(1); } } .nav li >a:hover { animation:ss 0.7s linear infinite forwards; } .nav li:hover>a { z-index:4; } .nav li:hover .sub { left:0; top:50px; width:150px; } .nav ul li { background :none repeat scroll 0 0 #ff6565; box-shadow:5px 5px 5px rgb(0,0,0,0.5); opacity:0.3; width :100%; } .nav li:hover ul li { animation:ss1 0.3s linear 1 forwards; } @keyframes ss1 { 0% { margin-left :300px;top:900px;transform:rotate(90deg); } 100% { margin-left :0px;top:0px;transform:rotate(360deg); opacity:1; } } .nav li:hover ul li:nth-child(3) { animation-delay:0; } .nav li:hover ul li:nth-child(2) { animation-delay:0.1s; } .nav li:hover ul li:nth-child(1) { animation-delay:0.2s; }