Variable number of repeated fields

Hi-
This might be an easy question, sorry if it is too basic. I'm hoping to create a form that collects information about a group of people where I don't know the number of people ahead of time. For example:

Group Name:
Individual Name: Individual Phone:
Individual Name: Individual Phone:
...
Individual Name: Individual Phone:

Ideally I'd like it if the form showed the first Individual Name slot with a button that said "Add another person" next to it. If that is too tough, I think it would also work if someone entered in the number of individuals first and then N slots were presented.

Is this doable? Thanks!

-- dNb

Thanks, Carl. Do you happen to have an example of hiding fields using conditional logic I could peek at? I don't recall seeing info on conditional logic at http://www.gravityhelp.com/documentation/ (I may not be looking in the right place).

-- dNb

Ok, got it. I just realized that you guys already made it easy as pie to use from the GUI. I was thinking for some reason there would be some coding involved. Thanks again for your help.