index.html

{% extends 'base.html' %}

{% block title %} Trackmaster {% endblock %}

{% block body %} 

{% if error == 1 %}
<h1>WRONG PASSWORD!!!</h1>
{% endif %}
{% if error == 2 %}
<h1>WRONG TID!!!</h1>
{% endif %}
<form method="post" action="index">
    <label>tid :</label>
    <input type="text" name="username" />
    <label>password :</label>
    <input type="password" name="password" />
    <button type="submit">Login</button>
</form>

{% endblock %}