How to add a floating logo over the entire page?

[wydteo]

Hey, I was wondering if it is possible with the Dawn theme to create this effect seen on the acnestudios website with a floating logo on their home page that follows as you scroll. Please let me know if you have any information on how to to do this. Thank you.

[wydteo]

Thank you so much for the response! That sounds great, I'd love to learn more about how to do the custom css if you are ok with guiding me through it. I'm new to Shopify CSS so I am trying to learn as much as i can.