[x2495iiii]

Added some more to it:

Code for a potentially infinite amount of zombies (try duplicating them yourself if you like, just be sure to rename them by capitalizing them and spacing the numbers to maintain consistency)

Code for lifebars representing the individual zombies' respective health amounts.

Code for damage modifiers according to gun used and part hit (Revolvers do 6, Sigs do 3, M93Rs do 1, number is multiplied by 2 for headshots, 1 for body shots, and 0.5 for anything else).

Code for target validation: shooting the ground and sky won't register as a hit

And finally, two more zombies, made by duplicating the first zombie, to demonstrate the first point.