FFT.Update C# (CSharp) Method

    void Update()
    {
        KeyInput();
    }

        static void render(int time, Graphics g)
        {
            if (g != null)
            {
                g.TranslateTransform(107f, 0f);
                g.FillRectangle(new SolidBrush(Color.Black), LOWERBOUND, 0, UPPERBOUND - LOWERBOUND * 2, 480);
            }

            fft.Update(time);
            iTime = time;

            foreach (Z z in zs)
            {
                if (z.start <= time && time < z.stop)
                {
                    isPhantomFrame = false;
                    if (rendering && time % z.framedelta != 0)
                    {
                        if (!processPhantom || time % z.phantomframedelta != 0)
                        {
                            continue;
                        }
                        isPhantomFrame = true;
                    }
                    int reltime = time - z.start;
                    z.draw(new SCENE(z.start, z.stop, time, g));
                }
            }

            if (g != null && !Widescreen)
            {
                Widescreen = true;
                Brush b = new SolidBrush(SystemColors.Control);
                g.FillRectangle(b, LOWERBOUND, 0, -LOWERBOUND, 480);
                g.FillRectangle(b, UPPERBOUND + LOWERBOUND, 0, -LOWERBOUND, 480);
                Widescreen = false;
            }
        }