Is 'scroll to' interaction using (current offset+number) possible?

I was prototyping a carousel that, upon clicking an arrow to either side, scrolls such that the next item to that side is completely in frame. I can prototype this properly for a single click, but not for clicks afterward because clicking again doesn’t change the offset again (it just applies the same offset and remains static).

My goal would be to use the ‘scroll to’ interaction such that each time the button is clicked, the original offset is added to the current offset (and for the arrow on the opposite side, I would do the same but with a negative offset) so I can show more of the behavior in the prototype beyond a single click’s worth. Does anybody know if there is currently a way to accomplish this?