Hey! There aren't any animations here. But you should be able to get a good effect by importing the images 1-4, making them repeat on the X and Y axes, and then adding a different speed to each of them to make a form of parallax scrolling. How exactly this is best done in Godot I don't know. In Unity the best solution is to use a scrolling texture shader, maybe something similar is applicable for you as well.
Hope that helps!