I found a tutorial for parallax scrolling, and i have code, but i have a new problem.

[Videogamejunkie443]

You have to give more information about your code.
Did you define background[0] and background[1] in the room editor or in the code?
You should also make sure that both backgrounds are set to "repeated".
As for the speed, you can tweak the 0.4 and 0.6 constants until it looks about right. The lower the constant is, the faster the scrolling will be.

Okay, first things first, I'm using Hello Mario Engine for Game Maker Studio & Hello Engine 6 Fan-Made for Game Maker 8/8.1. The All-Stars Rooms have 3 backgrounds. Background 0 is the sky, Background 1 is the clouds, and Background 2 is the hills. The object I created was made to be placed in a room. This would make backgrounds 1 and 2 move. So far, everything looks good. Also, I don't think I need to worry about the backgrounds repeating, but if you still want to know, they do repeat.