GameMaker Random Rooms

[iTypewriter]

Whats up Gamers, i need help with something. I need a way to randomize the backgrounds. For context, I've set the backgrounds as instances just so it'll be easier to manipulate. Each of the backgrounds are objects. I need a way to make multiple rooms, and a random cycle through the different backgrounds. I can work with either DnD or GML, feel free to explain it like I'm a middle schooler, lol

iTypewriter

 

[tagwolf]

The background image needs to be loaded from a sprite and set to the background layer.

You could either make your images a set of frames in one sprite and use something like:

layer_background_index(background_element_id, irandom(12));

or do something like this for different sprites:

layer_background_sprite(background_element_id, choose(spr_bg1, spr_bg2, etc etc...));

To get the element ID I reference this example form the manual:
https://docs2.yoyogames.com/source/...ooms/backgrounds/layer_background_sprite.html

var lay_id = layer_get_id("Background_sky");
var back_id = layer_background_get_id(lay_id);
if layer_background_get_sprite(back_id) != spr_Clouds
    {
    layer_background_sprite(back_id, spr_Clouds);
    }

Put any code like this into your game controller object (if you have one or make a controller object just for this) in the appropriate step or alarm or room begin or whatever event for your game.