How do I Know Position of Every Created Object?

Let's say I have an object named X, this X object is created every 5 seconds on the layer "game" with random width

I also want to create another object named Y, which I will put on the top of every created X Object

My question is how to do it?

I can't use set position based on other object's point of image since it's a tiled background

Thanks

Y or X is a tiled background?

Y or X is a tiled background?

x

I make an example that works just the way that you describing it, every 5 seconds tiled background spawns and a sprite spawns over it. Using container, and hotspot on a center of tiledbg.

Let me check it first, thank you very much for your help