Can I send an email to the same user of a loyalty program in a series after he has reached 4 orders - saying "hey you're 1 order away from a discount" and doing this every 4 orders ?

As in a series doing a circle --> every 4 orders sending this email?

I can't find a way to add +4 orders as a condition

Do I have to make an entry block for 4 orders - 9 orders - 14 orders, etc? Or is there a more pratical way