def emulate_machine():
    # These objects emulate the various parts of the machine
    video = Video()
    sound = Sound()
    cpu = CPU()
    # The frame object contains arrays of pixel data and sound
    # samples, and methods to manipulate them
    frame = Frame()
    # A line contains a line's worth of pixels
    line = Line()
    while True:
        frame.clear()
        line_ctr = 0
        while line_ctr < LINES_PER_FRAME:
            line.clear()
            cycle_ctr = 0
            while cycle_ctr < CYCLES_PER_LINE:
                # Each cycle of video emulation gives us eight
                # pixels of graphics data
                line.append_8_pixels(video.emulate_cycle())
                sound.emulate_cycle()
                cpu.emulate_cycle()
                cycle_ctr += 1
            # We store a full line of graphics in the framebuffer
            frame.set_gfx_line(line_ctr, line.get_pixels())
            # We sample the oscillators every line
            frame.set_audio_sample(line_ctr, sound.get_sample_value())
            line_ctr += 1
        # Draw a new frame 50 or 60 times per second
        frame.wait_vblank()
        frame.draw()
        # Play the audio samples at 15625 or 15750 Hz
        frame.play_audio_buffer()