How do I make NPCS defend you from hostile mobs?

Hello, you can use something like this:

local goodMob = goodmobLocation -- past here defending mob location

local badMob = badMobLocation -- past here bad mob location

local players = game:GetService("Players")


while wait() do -- infinite checking loop
    for i, v in pairs(players:GetChildren()) do
        local char = v:WaitForChild("Character")
        local hrp = char:WaitForChild("HumanoidRootPart")

        if (badMob.Position - hrp.Position).magnitude < 100 then  -- if badMob is less then 100 stoods away from player
            goodMob.Humanoid:MoveTo(badMob) -- this may be wrong, I dont have a lot of experience with MoveTo, you can use pathfinding service
        end
    end
end