GameMaker Random Background on Main Menu

[9intend0]

Hello! I was beginning to work on a game (my first) and I was trying to load in a random background from a set of sprites that I have. Essentially, every time a player opens the game, I want one of the various backgrounds come up (each background is ties to an element that you will gain control of in the game). I can't seem to find a reliable way to do it. The closest I got was creating an object which called on a random sprite from a list, but if I do that, I can't get it to parallax.
Is there something I'm missing? Is this even possible?

 

[curato]

easiest would be put all the backgrounds on the title screen and mark them invisible then turn one on at random with layer_set_visible

 

[9intend0]

easiest would be put all the backgrounds on the title screen and mark them invisible then turn one on at random with layer_set_visible

Ok, I'll try it. Do I add that code to a dummy object or somewhere else?
Pardon the simple question, I'm new to EVERYTHING haha

EDIT:
I got it to work!

var random_number=irandom_range(1,3)
if (random_number=1){
    var layer_id = layer_get_id("Water");
    layer_set_visible(layer_id,visible);
}
if (random_number=2){
    var layer_id = layer_get_id("Fire");
    layer_set_visible(layer_id,visible);
}
else {
    var layer_id = layer_get_id("Ground");
    layer_set_visible(layer_id,visible);
}