[Just to be double sure] any errors with this script?

local Map1 = game.Lighting.Map1
while true do
    wait(420)
    if (game.Workspace.Map1 ~= nil) then
        game.Workspace.Map1:Destroy()
    end
    local M = Instance.new("Message", game.Workspace)
    M.Text = "Inserting Toxic Speed"
    wait(2)
    Map1:Clone().Parent = game.Workspace
    M:Remove()
    wait(1)
end

It's a Map Changing script, I couldn't find any errors in output, Can you? Thanks.