HELP! Temporary redirect...but still see the page we don't want to show

We are trying to figure out temporary redirect here.

We searched the forum and the only solution for a temporary redirect is to include this in the page setting’s custom code section:

< meta http-equiv=“refresh” content=“0;URL=’'insert redirect url” />

So we tested it out. The page we want to redirect from is here.

But we can technically still see a second of this page before we got redirected. How can we make it so that if someone tries to visit this test page, they are automatically redirected without the need for the test page to load?

Our read-only link is here.