My first thought on the prompt is that the tenth layer has a specific meaning attached to it other than the usual layer or the floor of a building. When you build structures, it is good to build them by layers. Layer upon layer, it makes it rest on one another and the view is good in the end. But the foundation should be strong enough to carry the ten layers.
The climb on the layers can be discomforting at times but it is a good way to exercise sometimes. I take it as a way to move my body most of the time I have to climb through layers.
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