Don't miss that you can easily set Excel to automatically generate lists of fixed sets of items.
You may have noticed that you can easily create a list of the days of the week by entering Monday in a cell and then pulling down the autofill handle to the cells below.
If you go to File . . . Options . . Advanced, and scroll down you'll see that you have the option to 'Edit Custom Lists' in the general section.
Click on this box and a new dialog will open. You have the option to either key in a new a list or select it from an existing worksheet or spreadsheet.
Now when you enter the first item of the new list and pull down, the rest of the list will be generated. You can start with any subsequent item in the list and then generate the rest of the items, ultimately restarting at the beginning of the list.