"Make my rig called R15 Dummy follow players and it will damage them by 0.7 if it touches them"

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

local r15Dummy = game.Workspace.R15Dummy
local humanoid = r15Dummy.Humanoid
local root = r15Dummy.HumanoidRootPart
local debounce = false

function findNearestPlayer()
	local playerList = Players:GetPlayers()
	local nearestPlayer = nil
	local distance = nil
	local direction = nil 
	
	for _, player in pairs(playerList) do
		local character = player.Character
		if character then
			local distanceVector = character.PrimaryPart.Position - root.Position
			if not nearestPlayer then
				nearestPlayer = player
				distance = distanceVector.Magnitude
				direction = distanceVector.Unit
			elseif distanceVector.Magnitude < distance then
				nearestPlayer = player
				distance = distanceVector.Magnitude
				direction = distanceVector.Unit
			end
		end
	end
	
	return nearestPlayer, distance, direction
end

local function onTouched(hit)
	if game.Players:GetPlayerFromCharacter(hit.Parent) then
		if hit.Parent:FindFirstChild("Humanoid") ~= nil then
			if not debounce then
				debounce = true
				hit.Parent.Humanoid.Health = hit.Parent.Humanoid.Health - 0.7
				wait(1)
				debounce = false
			end
		end
	else
		print("Tried to damage an NPC, it was blocked.")
	end
end

RunService.Heartbeat:Connect(function()
	local nearestPlayer, distance, direction = findNearestPlayer()
	if nearestPlayer then
		humanoid:Move(direction)
	end
end)

root.Touched:Connect(onTouched)