Make chromecast sender from firebase folder

You have to make a receiver for the chromecast. Today I have pictures in firebase - so it should be possible to show the pictures in the folder as a slideshow. The receiver will be built in an app, and you just have to make the sender The folders name is a dynamic 5-digit number So if one tablet is set up with number 11223 then it has to receive from ...url..../11223 If a second tablet is setup with number 22334 then it have to receive from ...url..../22334 Next week the numbers will be different. So it's not enough you just make a system where it's the same single folder it loads pictures from. I have now try lots of freelancers and i'm a bit tied of lots of freelancers mean they can do it, and after spending weeks, they give-up | So if you have read this text and understand it please start with the word "lamp" when you bid on this project. -Jakob