Pop Under Script Creation- Google Compliant- Developer

We are looking for a freelance developer to create a pop under script that is google compliant. The requirements for the script are as follows: [login to view URL] on both Desktop and mobile [login to view URL] to set frequency cap on how many times the script will load the advert, 1.24, 1.12 for example. 3. Adaptable script where we can change the landing page/advert URL that loads, and also change the frequency cap when needed 4. Google Compliant- meaning that it will not be breach google chrome advertising standards, resulting in the hosting site being flagged or effected SEO traffic. 5. A second variation of the script would also be needed, where we could have the pop under load 1 url landing page after 5 seconds of the user coming to the publishing site, and then a 2nd actioned pop under would load after 30seconds on the site, with different url from the 1st pop under.