In the widget editor, you can select the type of widget and its parameters.
A live preview will be shown to the right of the editor.
Publish the widget to keep it forever.
You can now click the Get Embed Code button for embed instructions.
Demo: https://codecanyon.net/item/massive-cryptocurrency-widgets-phphtml-edition/23098271
Download:
massive-cryptocurrency-widgets-php-1.3.1.zip