My logo doesn't work as in the Demo website (Enfold - Responsive Multi-Purpose Theme)


I purchased the theme Enfold - Responsive Multi-Purpose Theme. In the demo ( Enfold 2017 – Just another Theme Demos Sites site ) you will see the ENFOLD logo on tight top corner changes color from white to black when you scroll down on the page. But when I went through script , it shows me only one image. How does this work if I want to upload my own logo as this.
Can you please help.



Hope this Documentation will help you.

Otherwise You can contact Enfold Author Support and let them know. Theme Author will be happy to assist you.