In this example, we'll redirect www.mysite.com/google to https://www.google.com.
First, create a empty page and set its URL to /google. (You can hide it in the navbar so visitors won't actually find it.) Then, in this code, change the redirectFrom and redirectTo variables as needed. Make sure you include the slash in redirectFrom.
Paste it into your Strikingly site's Footer Code and it'll perform the redirect!