The scene contains several elements, including a background image, snow hills, a Christmas tree, and a cat. Each element has a class called "background", "snow", or "tree-container", respectively, and a data-depth attribute that specifies the depth of the element in the parallax effect.
The background image is displayed twice, once as the left background and once as the right background, to create a seamless background effect. The snow hills are displayed both in front and behind the tree to create a 3D effect.
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