Tesla Coil, Strike Mobs!

To Filter Mobs:
Place a sign above the block where the power is input (doesn't matter which direction it faces), where the first line is [mobs] and the second line contains a list of all mobs that should be targeted by the coil. Alternatively, by including 'ex' on the top of any sign (like [players]ex) will put the coil in Exclusion mode, avoided the specified mobs and hitting all others. The characters are as follows:
Code:
c - Creeper
s - Spider
k - Skeleton
z - Zombie
h - Chicken
o - Cow
e - Sheep
w - Angry wolf
p - Cave Spider
b - Blaze
m - Magma Cube
v - Villager
d - Ender Dragon
i - Pig Zombie
n - Enderman