A More Complex Group Nesting

This pair of frames requires another level of grouping.

Although they are not visible, there is minute pair of hearts in the left frame that we want to be completely gone in the right frame, so that we don't have to carry them around in later frames. There is also a group of freckles in the right frame that do not appear in the left.

If we put both the tiny hearts and the freckles at the top of their respective background groups, then the two blue hearts would be matched to two of the freckles, causing them to float above the face for the first step or two. So we instead group the freckles with the back conehead path, causing them to be at the top of their group, and leave the blue hearts above the cheeks, where they will be at the top of the outer background group.

Notice that the back path in the left frame is matched to a group in the right frame. When this occurs, the path is treated as a group with one element.

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