NPC Chase Tutorial

local npc = script.Parent
local npcHumanoid = script.Parent:WaitForChild("Humanoid")
local npcHRP = script.Parent:WaitForChild("HumanoidRootPart")

npcHRP:SetNetworkOwner(nil)

local players = game:GetService("Players")
local runService = game:GetService("RunService")

local damage = 10

local function Chase()
	local target = nil
	local allPlayers = players:GetPlayers()

	for i, player in pairs(allPlayers) do
		local character = player.Character

		if character then
			local playerHRP = character:FindFirstChild("HumanoidRootPart")

			if playerHRP then

				if target then
					if (npcHRP.Position - target.Position).Magnitude > (npcHRP.Position - playerHRP.Position).Magnitude then

						target = playerHRP
					end
				else
					target = playerHRP
				end
			end
		end
	end

	if target then
		npcHumanoid:MoveTo(target.Position)
	end
end

local debounce = false

npcHRP.Touched:Connect(function(hit)
	local playerHumanoid = hit.Parent:FindFirstChild("Humanoid")

	if playerHumanoid and debounce == false then
		debounce = true
		playerHumanoid.Health -= damage

		wait(1)

		debounce = false
	end
end)

runService.Stepped:Connect(Chase)