{%if hasError %} <p><strong><font color="red"> {{hasError}} </font></strong></p> {%endif%}

{% with messages = get_flashed_messages() %}
{% if messages %}
<br>
{% for message in messages %}
<div class=flash>{{ message }}</div>
{% endfor %}
{% endif %}
{% endwith %}

<form method="POST" action="{{url_for('after_firstname')}}">
  <input type="text" name="prenom" placeholder="*Prenom*" />
  <input type="submit" value="Soumettre" />
</form>