How many secret bases can I hide in this square?

In this Mumbo Jumbo Minecraft redstone video, I try and see How many Hidden Minecraft bases can I hide in this square? This redstone video features hidden Minecraft bunkers, secret redstone staircases, hidden trapdoors and more. There are some simple hidden minecraft bases, and some advanced hidden minecraft bases.

Triple extender: https://www.youtube.com/watch?v=4m2CLZFL8pw

Hipster door: https://www.youtube.com/watch?v=XBYqPJZNZZ0

Filming channel: https://www.youtube.com/user/ThatMumboJumbo2
Instagram: https://www.instagram.com/officialmumbo/
Twitter: https://twitter.com/ThatMumboJumbo