WPM Tester Give Feedback Comment plz

local Players = game:GetService("Players")
local RunService = game:GetService("RunService")
local UserInputService = game:GetService("UserInputService")
local Player = Players.LocalPlayer
local PlayerGui = Player:WaitForChild("PlayerGui")

local function new(class, props)
	local obj = Instance.new(class)
	if props then
		for k,v in pairs(props) do
			obj[k] = v
		end
	end
	return obj
end

local math_random = math.random
math.randomseed(tick() % 2147483647)

local screenGui = new("ScreenGui", {Name="WPMTesterGUI", ResetOnSpawn=false, Parent=PlayerGui, ZIndexBehavior=Enum.ZIndexBehavior.Sibling})

local mainFrame = new("Frame", {
	Parent = screenGui,
	Name = "MainFrame",
	Size = UDim2.new(0,540,0,420),
	Position = UDim2.new(0.5,-270,0.5,-210),
	BackgroundColor3 = Color3.fromRGB(18,18,18),
	BorderSizePixel = 0,
})
mainFrame.Active = true
mainFrame.Draggable = true

new("UICorner", {Parent = mainFrame, CornerRadius = UDim.new(0,10)})

local header = new("Frame", {
	Parent = mainFrame,
	Size = UDim2.new(1,0,0,48),
	Position = UDim2.new(0,0,0,0),
	BackgroundTransparency = 1,
})