How to set up automatic Buy X Get Y discounts in Hydrogen Theme?

[Sergiu222]

Hello,
I'm trying to set up a Buy X Get Y discount type on a Shopify Hydrogen Theme.
The problem with this type of discount is that if a user buy product X then it gets exactly Y products at a discount price.

I need an automatic discount that applies after every additional X purchase.
I was thinking about creating automatic discounts (Buy X Get Y ) from the code depending on the quantity of products the user has but I don't think it's a good idea ?

Is there any alternative to this ?