[TYPO3] Redirect if you're not logged in

[Sergio Catalá]

Hi, 

I would like to show a specific content element ONLY if you're logged in
the FE. I can do that in the "General options" section inside the
content element, but my interest would be: redirect to a specific page
that allows you to log in if you're not. I'm only able to hide the
content element. 

Does anyone know the way to do that?  

Thanks, 
Sergio