- Every X ticks, search in a radius(sphere or box) of Z
- Choose random block from that array
if (Block != Material.AIR ) {
if ((block.location +1 in Y) == Material.AIR) {
if ((block.location +2 in Y) == Material.AIR) {
//spawn zombie
}else //find new random block and repeat
}else //find new random block and repeat
}else //find new random block and repeat