Terrain editor

-- terrain editor 
local Players = game:GetService("Players")
local UIS = game:GetService("UserInputService")
local RunService = game:GetService("RunService")
local player = Players.LocalPlayer
local mouse = player:GetMouse()
repeat task.wait() until player:FindFirstChild("PlayerGui")

local GUI_WIDTH = 280
local GUI_HEIGHT = 360

local gui = Instance.new("ScreenGui")
gui.Name = "TerrainEditorPro"
gui.IgnoreGuiInset = true
gui.ResetOnSpawn = false
gui.Parent = player.PlayerGui
gui.ZIndexBehavior = Enum.ZIndexBehavior.Sibling

local frame = Instance.new("Frame")
frame.AnchorPoint = Vector2.new(0.5,0.5)
frame.Position = UDim2.new(0.5,0,0.5,0)
frame.Size = UDim2.new(0,GUI_WIDTH,0,GUI_HEIGHT)
frame.BackgroundColor3 = Color3.fromRGB(35,35,35)
frame.Active = true
frame.Draggable = true
Instance.new("UICorner", frame).CornerRadius = UDim.new(0,16)
frame.Parent = gui

local title = Instance.new("TextLabel", frame)
title.Text = "🌍 Terrain Editor Pro v7.9"
title.Size = UDim2.new(1,0,0,32)
title.Position = UDim2.new(0,0,0,0)
title.BackgroundColor3 = Color3.fromRGB(50,50,50)
title.TextColor3 = Color3.new(1,1,1)
title.Font = Enum.Font.GothamBold
title.TextSize = 16
Instance.new("UICorner", title).CornerRadius = UDim.new(0,12)

local scroll = Instance.new("ScrollingFrame", frame)
scroll.Position = UDim2.new(0,10,0,36)