How can I make a camera similar to the one of Roblox Studio?

I need someone to make a camera script or teach me how to make a camera script that can be maneuvered by pressing W, A, S, or D. (the normal keys to move a character and the studio's camera) It also has to be able to be rotated with Right-Click & Drag.

Attempted Code:

local cam = workspace.CurrentCamera
--cam.CameraSubject = workspace.FreeCamera
cam.CameraType = "Custom"
local userInputService = game:GetService("UserInputService")
local player = game.Players.LocalPlayer
local X = 0
local Y = 0
local Z = 0

--[[
	Camera Controls:
	W = Moves camera forward (+X)
	A = Moves camera left (-Z?)
	S = Moves camera backwards (-X)
	D = Moves camera right (+Z?)
--]]
-- Handle inputBegan event (when player first presses a key)

userInputService.InputBegan:connect(function(inputObject)
	if inputObject.KeyCode == Enum.KeyCode.W then --Move forward
		X = X + 1
		cam.CoordinateFrame = CFrame.new(X, Y, Z)
	end
	if inputObject.KeyCode == Enum.KeyCode.S then --Move backwards
		X = X - 1		
		cam.CoordinateFrame = CFrame.new(X, Y, Z) 
	end
end)
 
-- Handle inputEnded event (when player releases a key)
userInputService.InputEnded:connect(function(inputObject)
	if inputObject.KeyCode == Enum.KeyCode.W then --Reverses the X/Y/Z position because? I have no clue why! :D
		X = X - 1 
	end
	if inputObject.KeyCode == Enum.KeyCode.S then
		X = X + 1
	end
	
end)

I kinda gave up mid-way so, yeah there's a lot of errors in there.

If you can help me or know someone who can help me, please respond! I really need this. ~Chez_Guy :)

I just noticed this post, Sorry that it took so long for a proper answer. Anyway, I made what you were wondering about. I edited CloneTrooper1090's NoClip script, and here it is (local ofc)

	-- Basic Freecam Script
	-- You can move faster by holding the click button [setting below ! :) ]
local allowspeedmove = true
wait(1)

local c = workspace.CurrentCamera
local player = game.Players.LocalPlayer
local userInput = game:GetService("UserInputService")
local rs = game:GetService("RunService")
local starterPlayer = game:GetService("StarterPlayer")
--local util = LoadLibrary("RbxUtility")
--local camSync = util.CreateSignal()

local selected = false
local speed = 60
local lastUpdate = 0

local camera = Instance.new('Part', workspace)
camera.CanCollide = false
camera.Anchored = true
camera.Transparency = 1
camera.Name = 'FreeCam'
camera.Position = player.Character.HumanoidRootPart.Position + Vector3.new(0,5,0)
--rs:BindToRenderStep("CamSync",190,function ()
--	camSync:fire()
--end)

c.Changed:connect(function (property)
	if property == "CoordinateFrame" then
--		camSync:fire()
	end
end)

function getNextMovement(deltaTime)
	local nextMove = Vector3.new()
	-- Left/Right
	if userInput:IsKeyDown("A") or userInput:IsKeyDown("Left") then
		nextMove = nextMove + Vector3.new(-1,0,0)
	end
	if userInput:IsKeyDown("D") or userInput:IsKeyDown("Right") then
		nextMove = nextMove + Vector3.new(1,0,0)
	end
	-- Forward/Back
	if userInput:IsKeyDown("W") or userInput:IsKeyDown("Up") then
		nextMove = nextMove + Vector3.new(0,0,-1)
	end
	if userInput:IsKeyDown("S") or userInput:IsKeyDown("Down") then
		nextMove = nextMove + Vector3.new(0,0,1)
	end
	-- Up/Down
	if userInput:IsKeyDown("Space") or userInput:IsKeyDown("Q") then
		nextMove = nextMove + Vector3.new(0,1,0)
	end
	if userInput:IsKeyDown("LeftControl") or userInput:IsKeyDown("E") then
		nextMove = nextMove + Vector3.new(0,-1,0)
	end
	return CFrame.new( nextMove * (speed * deltaTime) )
end

function onSelected()
	local char = player.Character
	if char then
		local root = camera
		currentPos = root.Position
		selected = true
		lastUpdate = tick()
		c.CameraSubject = root
		player.Character.HumanoidRootPart.Anchored = true
		while selected do
			local delta = tick()-lastUpdate
			local look = (c.Focus.p-c.CoordinateFrame.p).unit
			local move = getNextMovement(delta)
			local pos = root.Position
			root.CFrame = CFrame.new(pos,pos+look) * move
			lastUpdate = tick()
			wait(0.01)
		--	camSync:wait()
		end
		player.Character.HumanoidRootPart.Anchored = false
		c.CameraSubject = player.Character.Humanoid
		root.Velocity = Vector3.new()
	end
end

function onDeselected()
	selected = false
end

local isOn = true
spawn(onSelected)

function onKeyPressed(_,state)
	if state == Enum.UserInputState.Begin then
		isOn = not isOn
		if isOn then
			onSelected()
		else
			onDeselected()
		end
	end
end

local mouse = player:GetMouse()
mouse.Button1Down:Connect(function()
	if allowspeedmove then speed = 120 end
end)
mouse.Button1Up:Connect(function()
	speed = 60
end)

function ResetCamera()
	camera.Position = player.Character.HumanoidRootPart.Position + Vector3.new(0,5,0)
end

game:GetService("ContextActionService"):BindAction("Noclip Toggle",onKeyPressed,false,"r")
game:GetService("ContextActionService"):BindAction("Reset Camera Position",ResetCamera,false,"z")

**Yes, I do know you aren't allowed to request things, but I made this anyway, and I wanted to share it with others who may need it. :)