Build a Pop Up for Our Store to Get Emails for Newsletter Upon Entering/Exiting on Site

We need a beautiful, polite pop-up ad to gather emails from our site visitors similar to te one below. It must work with Yahoo store and Big Commerce. https://rich kids brand .com/ 1. Must be graphically pleasing and function correctly. 2. Must gather emails within the system (to make it easier to email customers. 3. Must have Name and Email fields. 4. Must show optional X out after a slight delay to prevent quick exiting. 5. Must remember to not request this info from current customers who have signed up.