Hey @tuanphan ! This is super helpful! I am attempting almost the same thing, but instead of inserting a gif as the image source, I want to insert the logo. I just need a loading page with a white background and black logo. Since The logo is stored on my computer and doesn't have a URL is there a way to upload my logo to squarespace and give it a url? I saw above Rdreed mentioned that his gif was "stored in the site's CSS stored files".
Would appreciate any help you can give me! Thank you :)