Why isn't my script working? Not displaying an error message

local stuff = script.Parent:GetChildren();
while wait(3) do
    for i,v in pairs(stuff) do
        if v:IsA("Part") then
            if (math.random(1,3) == 1) then
            wait()
            v.Anchored = false
            v.Fire1.Disabled = false
            print("hi")
            end
        end
    end
end