Simple Mob Farm
In this Instructable, I will show you how to build a simple, starter mob farm.
First Farm
Start by making a 26 high block pillar
Channels
Make a cross with 7 blocks on each arm.
Levels
Add the secondary spawn levels
Spawning
Add the primary spawn level,the water and the signs.
Walls
Add the foundations for the walls.
Building Higher
Add the second level to the walls. Make sure they look like the ones in the photo.
Taking Cover
Add the roof and you are done!