You can find Mosspaper's Widget here: https://app.mosspaper.com/d/#/widget. There are 2 sizes available for you to embed into your web site.
1) Log Into your Weebly account. If you don't have an account with Weebly, you can sign up below.
2) Select the page you would like to have the widget displayed.
3) Drag "Embed Code" and drop it into a page.
4) Click to set the custom HTML.
5) Copy and paste the HTML code into the element.
6) Double click.
Check out the widget here: http://mosspaper.weebly.com/