How to add a small magnifying glass to the lower right corner of the picture_html/css_WEB-ITnose

I plan to add a "click on the small image to see the big image" function, so I want to add a magnifying glass to the lower right corner of the image to express it, but I don't want to change the image. I remember seeing it on other websites, and it seemed like two layers were put together. Same thing. Does anyone know how to achieve this?

Reply to the discussion (solution)

If it is implemented on the same page. The page has a large picture, 100px*100px
The small picture is 20px *20px.
Click to enlarge just modify the width height