lass="navbar-toggler-icon"></span>
	</button>
	<div class="navbar-collapse collapse" id="navbarColor02" style="">
		<ul class="navbar-nav mr-auto d-flex align-items-center">
			<li class="nav-item">
			<a class="nav-link" href="./index.html">Intro</a>
			</li>
			<li class="nav-item dropdown">
			<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
			Examples </a>
			<div class="dropdown-menu" aria-labelledby="navb