Non veni pacem mittere, sed gladium.
It's not level...now I have to figure out how to build one, cause I showed this to the little woman....it is fascinating....
Here ya go...https://m.youtube.com/watch?v=-cz-uX-VJZo
How much fun would it be if the swimming pool could do that?
For most people, lots. For me, I'd find a way to drown.