-- SERVICES
local Players = game:GetService("Players")
local RunService = game:GetService("RunService")
local Workspace = game:GetService("Workspace")

local LocalPlayer = Players.LocalPlayer

-- CHARACTER FUNCTION
local function getCharacter()
    return LocalPlayer.Character or LocalPlayer.CharacterAdded:Wait()
end

-- GUI
local ScreenGui = Instance.new("ScreenGui")
ScreenGui.Name = "FollowGui"
ScreenGui.ResetOnSpawn = false
ScreenGui.Parent = LocalPlayer:WaitForChild("PlayerGui")

local Frame = Instance.new("Frame")
Frame.Size = UDim2.new(0, 200, 0, 70)
Frame.Position = UDim2.new(0.5, -100, 0.5, -35)
Frame.BackgroundColor3 = Color3.fromRGB(0, 0, 0)
Frame.BorderSizePixel = 0
Frame.Active = true
Frame.Draggable = true
Frame.Parent = ScreenGui

local UICorner = Instance.new("UICorner")
UICorner.CornerRadius = UDim.new(0, 12)
UICorner.Parent = Frame

local Button = Instance.new("TextButton")
Button.Size = UDim2.new(1, -10, 1, -10)
Button.Position = UDim2.new(0, 5, 0, 5)
Button.BackgroundColor3 = Color3.fromRGB(20, 20, 20)
Button.TextColor3 = Color3.fromRGB(255, 255, 255)
Button.Text = "Toggle"
Button.Font = Enum.Font.GothamBold
Button.TextSize = 16
Button.BorderSizePixel = 0
Button.Parent = Frame

local ButtonCorner = Instance.new("UICorner")
ButtonCorner.CornerRadius = UDim.new(0, 10)
ButtonCorner.Parent = Button

-- VARIABLES
local following = false
local targetModel = nil
local followConnection = nil
local BACK_DISTANCE = 4

-- CHECK VALID HUMANOID MODEL
local function isValidTarget(model)
    return model
        and model:IsA("Model")
        and model:FindFirstChild("Humanoid")
        and model:FindFirstChild("HumanoidRootPart")
        and model ~= getCharacter()
end

-- GET ALL POSSIBLE TARGETS (PLAYERS + DUMMIES)
local function getAllTargets()
    local targets = {}

    -- Players
    for _, plr in pairs(Players:GetPlayers()) do
        if plr ~= LocalPlayer and plr.Character then
            table.insert(targets, plr.Character)
        end
    end

    -- NPCs / Dummies
    for _, obj in pairs(Workspace:GetChildren()) do
        if isValidTarget(obj) then
            table.insert(targets, obj)
        end
    end

    return targets
end

-- FIND NEAREST TARGET (NO LIMIT)
local function getNearestTarget()
    local char = getCharacter()
    local hrp = char:FindFirstChild("HumanoidRootPart")
    if not hrp then return nil end

    local closest
    local shortest = math.huge

    for _, model in pairs(getAllTargets()) do
        if isValidTarget(model) then
            local dist = (model.HumanoidRootPart.Position - hrp.Position).Magnitude
            if dist < shortest then
                shortest = dist
                closest = model
            end
        end
    end

    return closest
end

-- STOP FOLLOW
local function stopFollow()
    following = false
    targetModel = nil
    if followConnection then
        followConnection:Disconnect()
        followConnection = nil
    end
    Button.Text = "Toggle (OFF)"
end

-- START FOLLOW
local function startFollow()
    targetModel = getNearestTarget()
    if not targetModel then return end

    following = true
    Button.Text = "Toggle (ON)"

    followConnection = RunService.Heartbeat:Connect(function()
        if not following then return end

        local char = getCharacter()
        local hrp = char:FindFirstChild("HumanoidRootPart")

        if not hrp or not isValidTarget(targetModel) then
            targetModel = getNearestTarget()
            return
        end

        local targetHRP = targetModel.HumanoidRootPart

        -- BACK OF TARGET
        local backPos =
            targetHRP.Position
            - (targetHRP.CFrame.LookVector * BACK_DISTANCE)

        hrp.CFrame = CFrame.new(backPos, targetHRP.Position)
    end)
end

-- BUTTON CLICK
Button.MouseButton1Click:Connect(function()
    if following then
        stopFollow()
    else
        startFollow()
    end
end)

-- AUTO RE-FOLLOW AFTER RESET
LocalPlayer.CharacterAdded:Connect(function()
    task.wait(1)
    if following then
        startFollow()
    end
end)