I need an AI script for my zombie survival game. I have absolutely no programming skills because I am an artist, not a programmer. Here is what I need the zombies to do:
1. Zombies scream and growl when chasing players and are nearly silent otherwise
2. Zombies need to be able to detect loud sounds such as gunshots and explosions. When they hear them, they should run toward the source,
3. Zombies should wander around the map when not chasing the player or running toward loud noises.
4. Zombies should have random amounts of health.
5. Zombies should spawn out of the players sight because that would just look bad.
6. There should be lots of zombies spawning.
I am using Unity 5 and the scripting language is unityScript. If you could give me an exact step-by-step guide as to how to implement the script you have come up with, I would really appreciate it.