Roblox rising lava script

-- Rising lava: the part climbs, kills on touch, then resets and repeats.

local START_DELAY = 10       -- seconds before the lava starts to rise
local RISE_HEIGHT = 60       -- studs to rise
local RISE_TIME = 90         -- seconds to rise that far
local PAUSE_AT_TOP = 5       -- seconds to wait at the top
local RESET_DELAY = 5        -- seconds to wait after dropping back down

local TweenService = game:GetService("TweenService")

local lava = script.Parent
lava.Anchored = true

local startPosition = lava.Position
local endPosition = startPosition + Vector3.new(0, RISE_HEIGHT, 0)

-- Kill anything with a Humanoid that touches the lava.
lava.Touched:Connect(function(hit)
	local humanoid = hit.Parent and hit.Parent:FindFirstChildOfClass("Humanoid")
	if humanoid and humanoid.Health > 0 then
		humanoid.Health = 0
	end
end)

local riseTween = TweenService:Create(
	lava,
	TweenInfo.new(RISE_TIME, Enum.EasingStyle.Linear),
	{ Position = endPosition }
)

while true do
	lava.Position = startPosition
	task.wait(START_DELAY)

	riseTween:Play()
	riseTween.Completed:Wait()

	task.wait(PAUSE_AT_TOP)
	lava.Position = startPosition
	task.wait(RESET_DELAY)
end