the best FLY

-- Fly Control (Clean Version)
-- LocalScript

local Players = game:GetService("Players")
local UIS = game:GetService("UserInputService")
local RS = game:GetService("RunService")

local player = Players.LocalPlayer
local char, hum, hrp

-- character update
local function updateChar()
	char = player.Character or player.CharacterAdded:Wait()
	hum = char:WaitForChild("Humanoid")
	hrp = char:WaitForChild("HumanoidRootPart")
end
updateChar()
player.CharacterAdded:Connect(updateChar)

-- remove old gui
if game.CoreGui:FindFirstChild("FlyGui") then
	game.CoreGui.FlyGui:Destroy()
end

-- GUI
local gui = Instance.new("ScreenGui")
gui.Name = "FlyGui"
gui.ResetOnSpawn = false
gui.Parent = game.CoreGui

local main = Instance.new("Frame")
main.Parent = gui
main.Size = UDim2.new(0,260,0,160)
main.Position = UDim2.new(0.05,0,0.4,0)
main.BackgroundColor3 = Color3.fromRGB(18,18,18)
main.BorderSizePixel = 0
main.Active = true
Instance.new("UICorner", main).CornerRadius = UDim.new(0,10)

-- drag bar
local dragBar = Instance.new("Frame", main)
dragBar.Size = UDim2.new(1,0,0,30)
dragBar.BackgroundColor3 = Color3.fromRGB(25,25,25)
dragBar.BorderSizePixel = 0
dragBar.Active = true
Instance.new("UICorner", dragBar).CornerRadius = UDim.new(0,10)

local title = Instance.new("TextLabel", dragBar)
title.Size = UDim2.new(1,0,1,0)
title.BackgroundTransparency = 1
title.Text = "Fly Control"
title.Font = Enum.Font.GothamMedium
title.TextColor3 = Color3.fromRGB(220,220,220)
title.TextScaled = true

-- drag logic
local dragging, dragStart, startPos
dragBar.InputBegan:Connect(function(i)
	if i.UserInputType == Enum.UserInputType.MouseButton1 then
		dragging = true
		dragStart = i.Position
		startPos = main.Position
	end
end)

UIS.InputEnded:Connect(function(i)
	if i.UserInputType == Enum.UserInputType.MouseButton1 then dragging = false end
end)

UIS.InputChanged:Connect(function(i)
	if dragging and i.UserInputType == Enum.UserInputType.MouseMovement then
		local delta = i.Position - dragStart
		main.Position = UDim2.new(
			startPos.X.Scale, startPos.X.Offset + delta.X,
			startPos.Y.Scale, startPos.Y.Offset + delta.Y
		)
	end
end)

-- Fly button
local flyButton = Instance.new("TextButton", main)
flyButton.Size = UDim2.new(0.9,0,0,32)
flyButton.Position = UDim2.new(0.05,0,0,40)
flyButton.Text = "Fly: OFF (B)"
flyButton.Font = Enum.Font.GothamMedium
flyButton.TextColor3 = Color3.fromRGB(255,80,80)
flyButton.BackgroundColor3 = Color3.fromRGB(30,30,30)
flyButton.BorderSizePixel = 0
Instance.new("UICorner", flyButton)

-- Speed text
local speedText = Instance.new("TextLabel", main)
speedText.Size = UDim2.new(0.9,0,0,20)
speedText.Position = UDim2.new(0.05,0,0,80)
speedText.BackgroundTransparency = 1
speedText.Font = Enum.Font.Gotham
speedText.TextColor3 = Color3.fromRGB(200,200,200)
speedText.Text = "Speed: 60"
speedText.TextScaled = true

-- Slider
local bar = Instance.new("Frame", main)
bar.Size = UDim2.new(0.9,0,0,6)
bar.Position = UDim2.new(0.05,0,0,115)
bar.BackgroundColor3 = Color3.fromRGB(45,45,45)
bar.BorderSizePixel = 0
Instance.new("UICorner", bar)

local knob = Instance.new("Frame", bar)
knob.Size = UDim2.new(0,12,1,0)
knob.Position = UDim2.new(0.12,0,0,0)
knob.BackgroundColor3 = Color3.fromRGB(0,170,255)
knob.BorderSizePixel = 0
Instance.new("UICorner", knob)

-- Fly system
local flying = false
local flySpeed = 60
local flyBV, flyBG
local moveDir = {W=0,S=0,A=0,D=0}

UIS.InputBegan:Connect(function(i,g)
	if g then return end

	if i.KeyCode == Enum.KeyCode.B then
		flyButton:Activate()
	end

	if i.KeyCode == Enum.KeyCode.W then moveDir.W = 1 end
	if i.KeyCode == Enum.KeyCode.S then moveDir.S = 1 end
	if i.KeyCode == Enum.KeyCode.A then moveDir.A = 1 end
	if i.KeyCode == Enum.KeyCode.D then moveDir.D = 1 end
end)

UIS.InputEnded:Connect(function(i)
	if i.KeyCode == Enum.KeyCode.W then moveDir.W = 0 end
	if i.KeyCode == Enum.KeyCode.S then moveDir.S = 0 end
	if i.KeyCode == Enum.KeyCode.A then moveDir.A = 0 end
	if i.KeyCode == Enum.KeyCode.D then moveDir.D = 0 end
end)

-- Slider logic
local sliding = false
knob.InputBegan:Connect(function(i)
	if i.UserInputType == Enum.UserInputType.MouseButton1 then sliding = true end
end)

UIS.InputEnded:Connect(function(i)
	if i.UserInputType == Enum.UserInputType.MouseButton1 then sliding = false end
end)

UIS.InputChanged:Connect(function(i)
	if sliding and i.UserInputType == Enum.UserInputType.MouseMovement then
		local p = math.clamp((i.Position.X - bar.AbsolutePosition.X) / bar.AbsoluteSize.X, 0, 1)
		knob.Position = UDim2.new(p,0,0,0)
		flySpeed = math.floor(10 + p * 490)
		speedText.Text = "Speed: "..flySpeed
	end
end)

-- Toggle fly
local function toggleFly()
	flying = not flying

	if flying then
		flyButton.Text = "Fly: ON (B)"
		flyButton.TextColor3 = Color3.fromRGB(80,255,80)

		hum.PlatformStand = true

		flyBV = Instance.new("BodyVelocity", hrp)
		flyBV.MaxForce = Vector3.new(1e9,1e9,1e9)

		flyBG = Instance.new("BodyGyro", hrp)
		flyBG.MaxTorque = Vector3.new(1e9,1e9,1e9)
		flyBG.P = 1e5

		RS:BindToRenderStep("FlyMove", 1, function()
			local cam = workspace.CurrentCamera
			local move = Vector3.new(
				moveDir.D - moveDir.A,
				0,
				moveDir.S - moveDir.W
			)

			if move.Magnitude > 0 then
				flyBV.Velocity = cam.CFrame:VectorToWorldSpace(move).Unit * flySpeed
			else
				flyBV.Velocity = Vector3.zero
			end

			flyBG.CFrame = cam.CFrame
		end)
	else
		flyButton.Text = "Fly: OFF (B)"
		flyButton.TextColor3 = Color3.fromRGB(255,80,80)

		RS:UnbindFromRenderStep("FlyMove")
		if flyBV then flyBV:Destroy() end
		if flyBG then flyBG:Destroy() end
		hum.PlatformStand = false
	end
end

flyButton.MouseButton1Click:Connect(toggleFly)