Recreating bouncing arrow animation (Legacy)


I’m trying to recreate this infinite bouncing arrow down animation from the hero section of this page:

Capture 2

As far as I understand it I need to use a legacy interaction as that’s the only way to create an infinite loop. I believe the interaction is happening in 4 stages but I might be wrong.
From -8px, 0px, -4px, 0px on the y axis.

Here’s my attempt which looks quite buggy right now:

I can’t seem to find a bounce easing setting while using the legacy option?
Is there a way to make it more bouncy somehow?

Here is my public share link: LINK
(how to access public share link)