Original discussion #10
I think an implementation possibility would be to add a plus button to the current background image select section o f the UI:
The idea would be that if you add more background images, then it uses the first one by default, and then has a dropdown select maybe for specifying the time remaining to trigger the specific background at.
For instance, you could have a default image, then click the plus I con to add an image that displays for one week remaining, and then one that displays for one day remaining, etc.
The biggest question would be how to make the date-remaining selection easy to make, but also flexible enough.