Looking for Yodeck high end programmer

Hi, I use Yodeck and Rasberry Pi 4 4GB for digital signage. If you already know I can add webpages in to the timeline. In the timeline I can set a static duration value (seconds) to show webpage. And here is my issue. My target is to set it to a dynamic value (seconds) I give whit my URL a QueryString. Example: [login to view URL] My QueryString "ns" = the value of duration (seconds) showing webpage via Yodeck. I try to approach this by support team from Yodeck but they 'ignore' it. There must be a way to override the duration of showing webpage. If you familiar with Yodeck and Raberry Pi...Javascript... I'm searching you! Conditions to work: I don't allow FTP access. Work only remote via AnyDesk, Skype, Teamviewer. I prefer Anydesk. Causion: I work on big screen. If you work with a laptop the rendering will be to small on your side. There is no example URL because it's protected by user password. Ofcourse I give you a account so you can check your results As I'm very familiar working with freelancers I looking out for a outstanding Freelancer. I have bad experience with (to many) trie & error. I want to hire a freelancer where I win time and not loose time. Are you good in javascript, Rasberry Pi 4 4GB AND Yodeck. Chat me! Thanks in advance.