Website Pop-up

Looking for a developer for multiple projects. But the first one is a pop-up for a website. It is a Wordpress website, but we have to code this independently instead of just installing a plug bid. The pop-up has to be able to write to a csv file, php or txt file, if we have to we can write to a database, but would rather have that as the last option. The back end (see screen shots) would allow admin to add specials to the pop-up and the pop-up would have a left and right scroll so that the visitor could look at the various specials. The back end would: * Allow for a title * Description * Embed code from their already established ecommerce solution (they would just create the online offer and copy and paste the embed code into the box so that it displayed inside the pop-up. * Start date and end date that it will display in the pop-up and then discontinue after the end date. See screen shot attached. Once hired, we'll work with how it should be displayed in the pop-up. I would rather the code stay in a separate file directory and completely run from within that file directory and we just be able to paste a simple line of code on the WP pages that we create that we want the pop-up to show rather than writing a lot of code to the actual site. Again, level of urgency here, no more than $250, must be done within 24 hours.