full screen , exit intent popup

hi guys
i am trying to achieve some thing like this...
http://www.marketingautomationinsider.com/infusionsoft-vs-active-campaign/

started a discussion here : https://premium.wpmudev.org/forums/topic/best-popup-plugin

Apparently this can be achieved but not sure how as i have no css skills :slight_frown:

Please could you help?