When creating a post please put in a title so people know what kind of help you’re asking for. A link to a project is not helpful because it cannot be clicked. It’s best to put the link to your project in the body.
The picture needs to be hosted somewhere public so that codepen can get to it.
An alternative is to search and find a picture already on-line and link to it by right clicking on the image and selecting “copy image address” and pasting that address as your source.