Mob trap- redefined

Hey guys, try this out!
i made a new mob trap (havent tested yet but should work) that uses redstone and complicated stuff cos im awesome and bored at the same time so, enjoy!

Sorry not much pictures and no movie cos i need this up really fast!

Do note that the trap is a darkroom spawner, so you will have to wait until a mob drops. if bored, fly up and break certain blocks cos some of then blocks are part of the mob trap. The mob trap will kill the mob by downing and some pistons will flow water. Also ideal for any type of block to make due to the absence of lava.