How do I duplicate a field based on the one above it being filled out?

I have a scenario where I added a Full Name field. I want that if that Field Name is filled out, it duplicates it and adds another Name Field. If that one is filled out it repeats and can repeat indefinitely. I am capturing names of people that enter a building and never know from day to day how many it will be. One day it might be 2 and another day it might be 10. Any help with accomplishing this? I tried a condition but that did not work.

There is no way you can duplicate a field through conditions. You can either add many fields as you want then show each by conditions or use any of the following widgets to dynamically add options:

https://widgets.jotform.com/widget/dynamic_textbox

https://widgets.jotform.com/widget/field_multiplier

https://widgets.jotform.com/widget/add_options 

To add a widget in the form, simply follow the steps from this guide: https://www.jotform.com/help/252-How-to-Add-a-Widget-to-your-Form.