local Players = game:GetService("Players")
local RunService = game:GetService("RunService")
local player = Players.LocalPlayer
local UIS = game:GetService("UserInputService")

-- Wait for character and camera
local character = player.Character or player.CharacterAdded:Wait()
local root = character:WaitForChild("HumanoidRootPart")

-- Create GUI
local gui = Instance.new("ScreenGui")
gui.Name = "FlyGui"
gui.ResetOnSpawn = false
gui.Parent = player:WaitForChild("PlayerGui")

-- Create Toggle Button
local button = Instance.new("TextButton")
button.Size = UDim2.new(0, 100, 0, 40)
button.Position = UDim2.new(0, 20, 0, 20)
button.Text = "Fly: OFF"
button.BackgroundColor3 = Color3.fromRGB(50, 50, 50)
button.TextColor3 = Color3.new(1, 1, 1)
button.Font = Enum.Font.SourceSansBold
button.TextScaled = true
button.Parent = gui

-- Fly state and controls
local flying = false
local speed = 50
local bodyGyro, bodyVelocity
local keys = {W = false, A = false, S = false, D = false}

-- Start flying
local function startFly()
	flying = true
	button.Text = "Fly: ON"
	
	bodyGyro = Instance.new("BodyGyro")
	bodyGyro.P = 9e4
	bodyGyro.MaxTorque = Vector3.new(9e9, 9e9, 9e9)
	bodyGyro.CFrame = root.CFrame
	bodyGyro.Parent = root

	bodyVelocity = Instance.new("BodyVelocity")
	bodyVelocity.Velocity = Vector3.zero
	bodyVelocity.MaxForce = Vector3.new(9e9, 9e9, 9e9)
	bodyVelocity.Parent = root
end

-- Stop flying
local function stopFly()
	flying = false
	button.Text = "Fly: OFF"
	
	if bodyGyro then bodyGyro:Destroy() end
	if bodyVelocity then bodyVelocity:Destroy() end
end

-- Toggle fly
local function toggleFly()
	if flying then
		stopFly()
	else
		startFly()
	end
end

button.MouseButton1Click:Connect(toggleFly)

-- Input tracking
UIS.InputBegan:Connect(function(input, processed)
	if processed then return end
	local key = input.KeyCode.Name
	if keys[key] ~= nil then
		keys[key] = true
	end
end)

UIS.InputEnded:Connect(function(input)
	local key = input.KeyCode.Name
	if keys[key] ~= nil then
		keys[key] = false
	end
end)

-- Fly logic
RunService.RenderStepped:Connect(function()
	if flying and bodyVelocity and bodyGyro then
		local cam = workspace.CurrentCamera
		local direction = Vector3.zero

		if keys.W then direction += cam.CFrame.LookVector end
		if keys.S then direction -= cam.CFrame.LookVector end
		if keys.A then direction -= cam.CFrame.RightVector end
		if keys.D then direction += cam.CFrame.RightVector end

		if direction.Magnitude > 0 then
			direction = direction.Unit
			bodyVelocity.Velocity = direction * speed
			bodyGyro.CFrame = CFrame.new(root.Position, root.Position + direction)
		else
			bodyVelocity.Velocity = Vector3.zero
		end
	end
end)