<svg width="100%" viewBox="0 0 720 720" xmlns:svg="http://www.w3.org/2000/svg">
<image width="720" height="720" xlink:href="https://i.stack.imgur.com/T3zFj.jpg" />
<rect id="MyDoor" fill="blue" opacity="0.4" x="300" y="340" width="100" height="200" onclick="alert('You have clicked the door.')" />
</svg>