This is a common pattern and a simple example for creating login page very quickly in django.Just place these files as described in the comment and Get login page

logcss.css

.vertical-offset-100{
    padding-top:100px;
}

login.html

{% load staticfiles %}
{% block content %}


<!-- This is a very simple parallax effect achieved by simple CSS 3 multiple backgrounds, made by http://twitter.com/msurguy -->
{% block stylesheets %}
<link rel="stylesheet" href="{% static 'css/bootstrap.min.css'%}">
<link rel="stylesheet" href="{% static 'css/logcss.css'%}">
{% endblock %}
<!-- This is a very simple parallax effect achieved by simple CSS 3 multiple backgrounds, made by http://twitter.com/msurguy -->

<div class="container">
    <div class="row vertical-offset-100">
    	<div class="col-md-4 col-md-offset-4">
    		<div class="panel panel-default">
			  	<div class="panel-heading">
			    	<h3 class="panel-title">Heading</h3>
			 	</div>
			  	<div class="panel-body">
			    	<form  action="{% url "mysite_login" %}" method="post" accept-charset="UTF-8">
			    	{% csrf_token %}
                    <fieldset>
			    	  	<div class="form-group">
			    		    <input class="form-control" placeholder="username" name="username" type="text">
			    		</div>
			    		<div class="form-group">
			    			<input class="form-control" placeholder="Password" name="password" type="password" value="">
			    		</div>
			    		<input class="btn btn-lg btn-success btn-block" type="submit" value="Login">
			    	</fieldset>
			      	</form>
			    </div>
			</div>
		</div>
	</div>
</div>

{% endblock %}

urls.py

...
urlpatterns += patterns('django.contrib.auth.views',
    url(r'^login/$', 'login', {'template_name': 'login.html'},
        name='mysite_login'),
    url(r'^logout/$', 'logout', {'next_page': '/'}, name='mysite_logout'),
)

Here Just copy login.html to templates folder of app.
Next add that section to urls.py
Just place logcss.css in static/css folder and also don't forget to include latest bootstrap.min.css