Create dropdown button easily

     --First Css Code--

<style>

/* Style The Dropdown Button */
.dropbtn{background-color:#4CAF50;color:white;padding:16px;font-size:16px;border:none;cursor:pointer;}
/* The container <div> - needed to position the dropdown content */

.dropdown{position:relative;display:inline-block;}
/* Dropdown Content (Hidden by Default) */
.dropdown-content{display:none;position:absolute;background-color:#f9f9f9;min-width:160px;box-shadow:0px 8px 16px 0px rgba(0,0,0,0.2);z-index:1;}
/* Links inside the dropdown */

.dropdown-content a{color:black;padding:12px 16px;text-decoration:none;display:block;}
/* Change color of dropdown links on hover */
.dropdown-content a:hover{background-color:#f1f1f1}/* Show the dropdown menu on hover*/
.dropdown:hover .dropdown-content{display:block;}
/* Change the background color of the dropdown button when the dropdown content is shown */
.dropdown:hover .dropbtn{background-color:#3e8e41;}
</style>

      --The Html Code --

<div class="dropdown">
<button class="dropbtn">Dropdown</button>
<div class="dropdown-content">
<a href="#">Link 1</a>
<a href="#">Link 2</a>
<a href="#">Link 3</a>
</div>
</div>
You can add more gadget using your brain (html,css)