<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>
<div class="container">
<div id="login-row" class="row justify-content-center align-items-center">
<div id="login-column" class="col-md-6">
<div class="box">
<div class="shape1"></div>
<div class="shape2"></div>
<div class="shape3"></div>
<div class="shape4"></div>
<div class="shape5"></div>
<div class="shape6"></div>
<div class="shape7"></div>
<div class="float">
<form class="form" action="">
<div class="form-group">
<label for="username" class="text-white">Username:</label><br>
<input type="text" name="username" id="username" class="form-control">
</div>
<div class="form-group">
<label for="password" class="text-white">Password:</label><br>
<input type="text" name="password" id="password" class="form-control">
</div>
<div class="form-group">
<input type="submit" name="submit" class="btn btn-info btn-md" value="submit">
</div>
</form>
</div>
</div>
</div>
</div>
</div>
