My way of making a mob spawner in minecraft

So i found a skeleton mobspawner underground and i decided to make it into my own personally mobspawner in order to get arrows, bones or xp. i had to cut off some parts and had to speed it up in order to make it less than 15 minutes becasue the whole thing took me about 30 minutes to do. If it seems like it is lagging it is because minecraft was laggin when i made this video so sorry about that Songs in the background are as follows: Baka to test opening theme The Pink fields by DOXX AND FEINT Mind and Motion by DOXX AND FEINT falling into place by DOXX AND FEINT Requiem by DOXX AND FEINT