Hello flash kitters

Could someone help me with a code that I've been searching for a while? This code that I'm looking for is supposed like this...

There is a hero/character and hes surrounded by zombies!!!!
But then the zombies that are surrounding him aren't coming to attack. This is because I'm looking for a code which lets the zombie to follow the hero/characters path. Also something to make the zombie look realistic! Like smooth rotation when it's turning. It's supposed to be real lifeish

In advance thank you!