[1.7.10]Attracting mobs to a block!

[Mecblader]

Hello, I am making a mod that will have a block that will have a block that certain mobs get attracted to and go near the block. The issue I am facing is that I need to be able to detect if a mob is within range of this block so I can add a task to its ai to come near the block. The issue is that for this to happen I need to know how to use aabb and I have not worked with them much, I know the basic functionality, but I have not worked with them. So I was wondering if there is a tutorial that could help me with aabbs in Minecraft. I have googled this before, but the implementations of aabb seem different than the way it is implemented in Minecraft. (Note I could be stupid and be wrong, but that was my first impression of this) All help is appreciated, Thank You.

[sequituri]

AABB is simply a set of points containing the start and end coordinate in each of the cardinal axes. So, it represents a quadrilateral in Minecraft space.

An Entity maybe inside that box or colliding with that box or outside it completely.

Nothing hard to understand there.