local TweenService = game:GetService("TweenService")
local part = script.Parent

local tweenInfo = TweenInfo.new(
    4,                                -- Length of an interpolation
    Enum.EasingStyle.Elastic,        -- Easing Style of the interpolation
    Enum.EasingDirection.Out,        -- Easing Direction of the interpolation
    1,                                -- Number of times the sequence will be repeated
    true,                            -- Should the sequence play in reverse as well?
    2                                -- Delay between each interpolation (including reverse)
)


while wait() do
    local propertyGoals =
    {
        Position = part.Position + Vector3.new(0,5,0)
    }
    local tween = TweenService:Create(part,tweenInfo,propertyGoals)
    tween:Play()
 	wait(4)
    propertyGoals =
    {
        Position = part.Position + Vector3.new(0,-5,0)
    }
    tween = TweenService:Create(part,tweenInfo,propertyGoals)
    tween:Play()
	wait(4)
end