<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="4/w3.css">
<body>
<div class="w3-sidebar w3-bar-block w3-card w3-animate-left" style="display:none" id="leftMenu">
<button onclick="closeLeftMenu()" class="w3-bar-item w3-button w3-large">Close ×</button>
<a href="#" class="w3-bar-item w3-button">Link 1</a>
<a href="#" class="w3-bar-item w3-button">Link 2</a>
<a href="#" class="w3-bar-item w3-button">Link 3</a>
</div>
<div class="w3-sidebar w3-bar-block w3-card w3-animate-right" style="display:none;right:0;" id="rightMenu">
<button onclick="closeRightMenu()" class="w3-bar-item w3-button w3-large">Close ×</button>
<a href="#" class="w3-bar-item w3-button">Link 1</a>
<a href="#" class="w3-bar-item w3-button">Link 2</a>
<a href="#" class="w3-bar-item w3-button">Link 3</a>
</div>
<div class="w3-teal">
<button class="w3-button w3-teal w3-xlarge w3-left" onclick="openLeftMenu()">☰</button>
<button class="w3-button w3-teal w3-xlarge w3-right" onclick="openRightMenu()">☰</button>
<div class="w3-container">
<h1>My Page</h1>
</div>
</div>