Virus Function - Minecraft PE Addons

This function implements a virus in every Minecraft Worlds you want. The engine produces a virus, which only kills cows, sheep and villager in circa 30 seconds. I also included  some effects that indicate how far the disease has progressed.

To create such a virus you first need to rename an item of your choice (every item is possible) into virus (all in small letters)

Next you have to open the chat menu and write /function Virus_Engine  (and hit enter).
This will build a little structure like this one:

The you must write two commands into the command blocks:

To start the engine you only must destroy the redstone block and to stop the engine you need to place a redstone block or torch at one of the two hoppers.

Last but not least you must drop your “virus” item near a cow, a sheep or a villager (then you can pick up the item again). The virus will automatic spread out if there is a mob in a radius of 20 blocks and which could be infected. Later the virus can be transmitted from mob to mob. It will stop spreading out, if there isn`t no more “food”.

have just been infected:

near to death:

Tip:
If you know enough about functions, you can modify the script, so that it for example kills chickens too.