open source fly script

local players = game:GetService("Players")
local uis = game:GetService("UserInputService")
local run = game:GetService("RunService")
local lp = players.LocalPlayer

local core = Instance.new("ScreenGui")
core.Name = "fly script"
core.ResetOnSpawn = false
core.Parent = lp:WaitForChild("PlayerGui")

local main = Instance.new("Frame")
main.Size = UDim2.new(0, 260, 0, 160)
main.Position = UDim2.new(0.5, -130, 0.5, -80)
main.BackgroundColor3 = Color3.fromRGB(255, 255, 255)
main.BorderSizePixel = 0
main.Active = true
main.Draggable = true
main.Parent = core

local grad = Instance.new("UIGradient")
grad.Color = ColorSequence.new({
    ColorSequenceKeypoint.new(0, Color3.fromRGB(40, 40, 45)),
    ColorSequenceKeypoint.new(1, Color3.fromRGB(20, 20, 25))
})
grad.Rotation = 45
grad.Parent = main

Instance.new("UICorner", main).CornerRadius = UDim.new(0, 10)

local title = Instance.new("TextLabel")
title.Size = UDim2.new(1, -10, 0, 35)
title.Position = UDim2.new(0, 10, 0, 0)
title.BackgroundTransparency = 1
title.Text = "FLIGHT"
title.TextColor3 = Color3.fromRGB(255, 255, 255)
title.TextXAlignment = Enum.TextXAlignment.Left
title.Font = Enum.Font.SourceSansBold
title.TextSize = 16
title.Parent = main

local close = Instance.new("TextButton")
close.Size = UDim2.new(0, 30, 0, 30)
close.Position = UDim2.new(1, -35, 0, 5)
close.BackgroundTransparency = 1
close.Text = "×"
close.TextColor3 = Color3.fromRGB(255, 100, 100)
close.TextSize = 25
close.Parent = main

local function make_box(placeholder, pos, default)
    local b = Instance.new("TextBox")
    b.Size = UDim2.new(0.85, 0, 0, 35)
    b.Position = pos
    b.BackgroundColor3 = Color3.fromRGB(0, 0, 0)
    b.BackgroundTransparency = 0.6
    b.PlaceholderText = placeholder
    b.Text = default
    b.TextColor3 = Color3.new(1, 1, 1)
    b.Font = Enum.Font.SourceSans
    b.TextSize = 14
    b.Parent = main
    Instance.new("UICorner", b).CornerRadius = UDim.new(0, 6)
    return b
end

local spd_in = make_box("Speed (Num)", UDim2.new(0.075, 0, 0.3, 0), "50")
local key_in = make_box("Toggle Key (Char)", UDim2.new(0.075, 0, 0.6, 0), "E")

local active = false
local cur_speed = 50
local bind = Enum.KeyCode.E

local bv = Instance.new("BodyVelocity")
local bg = Instance.new("BodyGyro")

local function toggle()
    local root = lp.Character and lp.Character:FindFirstChild("HumanoidRootPart")
    if not root then return end

    active = not active
    if active then
        bv.Parent = root
        bv.MaxForce = Vector3.new(1e5, 1e5, 1e5)
        bv.Velocity = Vector3.new(0, 0, 0)

        bg.Parent = root
        bg.MaxTorque = Vector3.new(1e5, 1e5, 1e5)
        bg.CFrame = root.CFrame
    else
        bv.Parent = nil
        bg.Parent = nil
        if lp.Character:FindFirstChildOfClass("Humanoid") then
            lp.Character.Humanoid.PlatformStand = false
        end
    end
end

close.MouseButton1Click:Connect(function()
    if active then toggle() end
    core:Destroy()
end)

spd_in.FocusLost:Connect(function()
    cur_speed = tonumber(spd_in.Text) or 50
end)

key_in.FocusLost:Connect(function()
    local ok, res = pcall(function() return Enum.KeyCode[key_in.Text:upper()] end)
    if ok then bind = res end
end)

uis.InputBegan:Connect(function(io, gpe)
    if not gpe and io.KeyCode == bind then
        toggle()
    end
end)

run.RenderStepped:Connect(function()
    local char = lp.Character
    if active and char and char:FindFirstChild("HumanoidRootPart") then
        local root = char.HumanoidRootPart
        local cam = workspace.CurrentCamera
        local dir = Vector3.new(0, 0, 0)

        if uis:IsKeyDown(Enum.KeyCode.W) then dir += cam.CFrame.LookVector end
        if uis:IsKeyDown(Enum.KeyCode.S) then dir -= cam.CFrame.LookVector end
        if uis:IsKeyDown(Enum.KeyCode.A) then dir -= cam.CFrame.RightVector end
        if uis:IsKeyDown(Enum.KeyCode.D) then dir += cam.CFrame.RightVector end

        bv.Velocity = dir * cur_speed
        bg.CFrame = cam.CFrame
        char.Humanoid.PlatformStand = true
    end
end)