Colour change in columns depending on dates

Hello,

Can anyone give me some advice on a problem I'm having with excel.

I have two columns, one with the date an item is clear for collection(H), and the next column the date the item is at the hub(I). I need to have the cell in column I change from green after 2 days, then change to orange after 3 days and then to red after 4 days. Also, if this is possible, once the date has been entered in column I, would the cell be able to go back to white?

I have tried various formulas from various sites and I have watched plenty of videos, but can't quite get it to work, or if it's even possible, although i will add that I'm far from an expert on excel.


Thank you.

Jon