I Need help making backgrounds move at different speeds in Hello Mario Engine GMS.

[Vert]

Wasn't this a built-in feature in GMS? Pretty sure you can set the horizontal speed for a background and it should do what you ask.

I think what I'm trying to do is called Parallax Scrolling? I don't really know what it's called, but I do know what it looks like.

Yeah, I know what you mean. I'm pretty sure if you tinker with the horizontal speeds in a background's settings you can make them scroll faster.