Hide the logo and to make it appear after a user has scrolled down a bit

Hello and thank you for this great theme!

I am trying to hide the logo and to make it appear after a user has scrolled down a bit.
I followed the instructions mentioned here, but I failed to reproduce it.

The site is in “under construction mode” so please let me know how can I send you the login credentials.

Any help would be appreciated,

Thank you.

Hello there,

You can send the login credentials to kharisblank@gmail.com and mention the link to this topic in your message body to indicate it comes from you.

Regards,
Kharis

Thank you Kharis for your quick reply!
I send you an email with the credentials.

Thank you. I replied it already.

Regards,
Kharis

Thank you very much!
great support!!