"Make a menu with three buttons"

-- local script (StarterGui) 
local player = game.Players.LocalPlayer
local screenGui = Instance.new("ScreenGui", player.PlayerGui)

local menuFrame = Instance.new("Frame", screenGui)
menuFrame.Size = UDim2.new(0, 200, 0, 150)
menuFrame.Position = UDim2.new(0.5, -100, 0.5, -75)
menuFrame.BackgroundColor3 = Color3.fromRGB(255, 255, 255)
menuFrame.BorderSizePixel = 0

local button1 = Instance.new("TextButton", menuFrame)
button1.Size = UDim2.new(0, 150, 0, 50)
button1.Position = UDim2.new(0.5, -75, 0.2, 0)
button1.Text = "Button 1"
button1.TextColor3 = Color3.fromRGB(0, 0, 0)
button1.BackgroundColor3 = Color3.fromRGB(255, 255, 255)
button1.BorderSizePixel = 0
button1.Font = Enum.Font.SourceSans
button1.TextSize = 20

local button2 = Instance.new("TextButton", menuFrame)
button2.Size = UDim2.new(0, 150, 0, 50)
button2.Position = UDim2.new(0.5, -75, 0.5, 0)
button2.Text = "Button 2"
button2.TextColor3 = Color3.fromRGB(0, 0, 0)
button2.BackgroundColor3 = Color3.fromRGB(255, 255, 255)
button2.BorderSizePixel = 0
button2.Font = Enum.Font.SourceSans
button2.TextSize = 20

local button3 = Instance.new("TextButton", menuFrame)
button3.Size = UDim2.new(0, 150, 0, 50)
button3.Position = UDim2.new(0.5, -75, 0.8, 0)
button3.Text = "Button 3"
button3.TextColor3 = Color3.fromRGB(0, 0, 0)
button3.BackgroundColor3 = Color3.fromRGB(255, 255, 255)
button3.BorderSizePixel = 0
button3.Font = Enum.Font.SourceSans
button3.TextSize = 20