Roblox disappearing platform script

-- Disappearing platform: touched -> short delay -> gone -> comes back.

local DELAY_BEFORE_FALL = 1     -- seconds after the touch before it vanishes
local TIME_GONE = 3             -- seconds it stays invisible
local FADE_TIME = 0.4           -- seconds the fade takes

local Players = game:GetService("Players")
local TweenService = game:GetService("TweenService")

local platform = script.Parent
local active = false

platform.Touched:Connect(function(hit)
	if active then
		return
	end
	if not Players:GetPlayerFromCharacter(hit.Parent) then
		return
	end

	active = true

	task.wait(DELAY_BEFORE_FALL)

	local fadeOut = TweenService:Create(platform, TweenInfo.new(FADE_TIME), { Transparency = 1 })
	fadeOut:Play()
	fadeOut.Completed:Wait()
	platform.CanCollide = false

	task.wait(TIME_GONE)

	platform.CanCollide = true
	local fadeIn = TweenService:Create(platform, TweenInfo.new(FADE_TIME), { Transparency = 0 })
	fadeIn:Play()
	fadeIn.Completed:Wait()

	active = false
end)