Asteroid Script

local tweenService = game:GetService("TweenService")
local tweenTime = 2
local info = TweenInfo.new(tweenTime)
local asteroidHeight = 150

local function tweenModel(model, CF)
    local CFrameValue = Instance.new("CFrameValue")
    CFrameValue.Value = model:GetPrimaryPartCFrame()

    CFrameValue:GetPropertyChangedSignal("Value"):Connect(function()
        model:SetPrimaryPartCFrame(CFrameValue.Value)
    end)

    local tween = tweenService:Create(CFrameValue, info, {Value = CF})
    tween:Play()

    tween.Completed:Connect(function()
        CFrameValue:Destroy()
    end)
end

function animateAsteroid()
    local baseplatePosition = game.Workspace.Baseplate.Position
    local baseplateSize = game.Workspace.Baseplate.Size

    local randomXCframe = math.random(baseplatePosition.X - baseplateSize.X /2, baseplatePosition.X + baseplateSize.X / 2)
    local randomZCframe = math.random(baseplatePosition.Z - baseplateSize.Z /2, baseplatePosition.Z + baseplateSize.Z / 2)

    local Asteroid = script.Asteroid:Clone()
    Asteroid.Parent = game.Workspace
    Asteroid:SetPrimaryPartCFrame(CFrame.new(randomXCframe, asteroidHeight, randomZCframe))

    local xTweenTo = math.random(baseplatePosition.X - baseplateSize.X /2, baseplatePosition.X + baseplateSize.X / 2)
    local zTweenTo = math.random(baseplatePosition.Z - baseplateSize.Z /2, baseplatePosition.Z + baseplateSize.Z / 2)

    tweenModel(Asteroid, CFrame.new(xTweenTo, baseplatePosition.Y - 10, zTweenTo))
    wait(tweenTime)
    Asteroid:Destroy()
end

wait(1)
animateAsteroid()