How to Add HTML (custom widgets) to a page or post:
1. Log in to Wix, and click the + button on the left side of the Editor.
2. Click More, then drag and drop HTML Code into place on your page.
3. Click on the gray box and then Enter Code.
4. Copy your widget code (from: https://designfiles.co/settings/widget) and paste it into the HTML Settings window.
5. Click Update and resize the box to fit the widget.