Application for Builder. (Harry Potter)

Code:
Minecraft name: RedDalon

 What do you like the most about redstone?: The amount of possibilities it gives. You can make almost everything with redstone as long as you have the knowledge. Also, I like how you can solve a " problem" in multiple ways.

 What's a thing you have made which demonstrates redstone knowledge?: Good question, A block "hider"

 What does it do?: It's a build which hides a block in the wall (so its completely gone), so you can later on make it pop up again. (its hard to explain...its with double pistons)

 Image and/or video, from imgur.com or youtube.com:

https://www.youtube.com/watch?v=XZa2Dwriols I know this is a redstone server but I think this shows my knowledge as well. It's a system which makes arrows explode with a cool particle thingy, in the video I used wayyyy too many command blocks because I wanted to break obsidian with it, 75% of the command blocks are for the tnt...

http://imgur.com/a/N92Ge and here is a block hide contraption.

 What do you plan on making for your build trial?: A block hider.

 Do you agree with the rules?: Yes.

FuminMcFloofin recommended me to call the post Harry Potter.