-- Place this LocalScript in a ScreenGui in StarterGui

local player = game.Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")

-- Create the GUI button
local screenGui = Instance.new("ScreenGui")
screenGui.Parent = player:WaitForChild("PlayerGui")

local button = Instance.new("TextButton")
button.Size = UDim2.new(0, 200, 0, 50)
button.Position = UDim2.new(0.5, -100, 0.5, -25)
button.Text = "Change Speed"
button.Parent = screenGui

-- Function to change speed
local function changeSpeed()
    local newSpeed = 50  -- Change this value to your desired speed
    humanoid.WalkSpeed = newSpeed
end

-- Connect button click to function
button.MouseButton1Click:Connect(changeSpeed)