Where do I put my URL into this source code?

https://fftyyllenhk.tumblr.com/

I want to make a prelander like this

I already found the code for the prelander:
Code:

Code:
<!DOCTYPE html><script>var __pbpa = true;</script><script>var translated_warning_string = 'Warning: Never enter your Tumblr password unless \u201chttps://www.tumblr.com/login\u201d\x0ais the address in your web browser.\x0a\x0aYou should also see a green \u201cTumblr, Inc.\u201d identification in the address bar.\x0a\x0aSpammers and other bad guys use...

Where do I put my URL into this source code?