How can I have pop-up forms only display once on my landing page?

I added a pop-up to allow email capture on my website from your forms - very easy to apply - but the one question I can't seem to figure out., relating to a pop-up or modal type of email capture.

I set up a subscribe form to capture emails -- and noticed that the form continues to pop up even if I select remember cookies - thus to not show over and over for a single user.  Am I missing something to stop this from occuring?  Intent would be for the first time users to see the modal or pop-up when going to our landing page, adding their email - and then once added, doesn't keep popping up afterwards.., 

Thanks 

To control that you will need to add some JavaScript code and handle the cookies, note that this requires some programming language knowledge, here is a link that will provide you an idea about how this can be done: https://stackoverflow.com/questions/24189428/display-a-popup-only-once-per-user/24189694

I hope this helps.