how to add background image in django code example

Example 1: background image css django

#third{
     background: url("/static/img/sample.jpeg") 50% 0 no-repeat fixed;
     color: white;
     height: 650px;
     padding: 100px 0 0 0;   
     }

Example 2: add background image in django uploaded file

{% load static %}
     <img src="{% static "my_app/example.jpg" %}" alt="My image"/>