Does this plugin exist? Please help

I’m just wondering does anyone know if a Plugin exists that will do this:

When i give someone a link to a post or page on my blog, The page will load but the plugin will redirect the visitor away to a specified URL after a specified period of time.

For example, if i give someone a url to my post with guidelines on how to use a certain file, They can read that and after a certain time, they will be sent to the download website.

I’ve searched and searched but can’t seem to find any that fit the description. Please let me know if one exists.