local player = owner

local character = player.Character

local buildevent = Instance.new("RemoteEvent", player.PlayerGui)
buildevent.Name = "buildevent"
local cycleevent = Instance.new("RemoteEvent", player.PlayerGui)
cycleevent.Name = "cycleevent"
local displayevent = Instance.new("RemoteEvent", player.PlayerGui)
displayevent.Name = "displayevent"

local tool = Instance.new("Tool", player.Backpack)
tool.RequiresHandle = nil
tool.Name = "Build"

local wall = Instance.new("Part")
wall.Size = Vector3.new(8, 6, 2)
wall.Anchored = true
wall.BrickColor = BrickColor.new("Persimmon")
wall.Material = Enum.Material.Brick

local truss = Instance.new("TrussPart")
truss.Size = Vector3.new(2, 6, 2)
truss.Anchored = true
truss.BrickColor = BrickColor.new("Medium stone grey")
truss.Material = Enum.Material.CorrodedMetal

local panel = Instance.new("Part")
panel.Size = Vector3.new(8, 1, 8)
panel.Anchored = true
panel.BrickColor = BrickColor.new("Burgundy")
panel.Material = Enum.Material.WoodPlanks

local door = Instance.new("Part")
door.Size = Vector3.new(4, 6, 2)
door.CanCollide = false
door.Anchored = true
door.BrickColor = BrickColor.new("Earth orange")
door.Material = Enum.Material.Wood

local structures = {wall, truss, panel, door}
local pointer = 1
local selection = structures[1]

buildevent.OnServerEvent:Connect(function(p, hit, rot)
	if tool.Parent == character and selection then
		local clone = selection:Clone()
		clone.CFrame = CFrame.new(math.floor(hit.X + 0.5), math.floor(hit.Y + 0.5) + clone.Size.Y / 2 , math.floor(hit.Z + 0.5)) * CFrame.Angles(0, math.rad(rot), 0)
		clone.Parent = workspace
	end
end)

cycleevent.OnServerEvent:Connect(function()
	pointer += 1
	if pointer > #structures then
		pointer = 1
	end
	selection = structures[pointer]
	displayevent:FireClient(player, selection.Size)
end)

NLS([[
local player = game.Players.LocalPlayer

local character = player.Character

local camera = workspace.CurrentCamera
local mouse = player:GetMouse()

local buildevent = player.PlayerGui:FindFirstChild("buildevent")
local cycleevent = player.PlayerGui:FindFirstChild("cycleevent")
local displayevent = player.PlayerGui:FindFirstChild("displayevent")

local example = Instance.new("Part", workspace)
example.Size = Vector3.new(8, 6, 2)
example.Transparency = 1
example.CanCollide = false
example.Anchored = true
mouse.TargetFilter = example
Instance.new("SelectionBox", example).Adornee = example

local instructions = Instance.new("Hint", workspace)
instructions.Text = "Press [E] to place, [Q] to cycle between parts and [R] to rotate."
game:GetService("Debris"):AddItem(instructions, 10)

local rotation = 0

local UserInputService = game:GetService("UserInputService")

UserInputService.InputBegan:Connect(function(input, position)
	if UserInputService:GetFocusedTextBox() == nil then
		if input.UserInputType == Enum.UserInputType.Keyboard then
			if input.KeyCode == Enum.KeyCode.E then
				buildevent:FireServer(mouse.Hit, rotation)
			end
			if input.KeyCode == Enum.KeyCode.Q then
				cycleevent:FireServer()
			end
			if input.KeyCode == Enum.KeyCode.R then
				rotation = rotation + 90
			end
		end
	end
end)

displayevent.OnClientEvent:Connect(function(size)
	example.Size = size
end)

while true do
	local tool = player.Character:FindFirstChildWhichIsA("Tool")
	if tool and tool.Name == "Build" then
		example.Parent = workspace
	else
		example.Parent = nil
	end
	example.CFrame = CFrame.new(math.floor(mouse.hit.X + 0.5), math.floor(mouse.hit.Y + 0.5) + example.Size.Y / 2 , math.floor(mouse.hit.Z + 0.5)) * CFrame.Angles(0, math.rad(rotation), 0)
	task.wait()
end

]], player.PlayerGui)