public class BootupECSJob
{
    public static MeshInstanceRenderer cubeLook;
    public static Settings settings;

    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterSceneLoad)]
    public static void Init()
    {
        EntityManager entityManager = World.Active.GetOrCreateManager<EntityManager>();

        cubeLook = GetLookFromPrototype("CubePrototype");

        GameObject go = GameObject.Find("Settings");
        settings = go.GetComponent<Settings>();

        int channelCount = World.Active.GetOrCreateManager<SpectrumSystem>().Init(settings);
        World.Active.GetOrCreateManager<SpawnCubeSystem>().Init(settings,
                                                                entityManager,
                                                                cubeLook);

        World.Active.GetExistingManager<TransformSystem>().Enabled = false;
    }

    private static MeshInstanceRenderer GetLookFromPrototype(string protoName)
    {
        GameObject proto = GameObject.Find(protoName);
        MeshInstanceRenderer result = proto.GetComponent<MeshInstanceRendererComponent>().Value;
        Object.Destroy(proto);
        return result;
    }
}

public struct Cube : IComponentData {}

public struct Origin : IComponentData
{
    public float3 Value;
}