3rd person zombie game scripting errors and enemy AI

I am creating a 3rd person zombie game and i am having a lot of trouble creating a zombie AI which functions properly, several script related errors and lack of coding knowledge are really preventing me from progressing in this key area of the game, could anyone help me with this?

You could go to the asset store and download or but AI things or objects to help you.

hum, dont get me wrong or anything, but isn’t sort of the whole thing with the zombie concept a being with a total lack of intelligence… xD. All the zombie enities need to do is spawn, move towards the player, and once within range, attack. Can’t be to hard to script that hehe