code: def begin(self):
          
          # Turn on the oscillator.
          self._device.writeList(HT16K33_SYSTEM_SETUP | HT16K33_OSCILLATOR, [])
          # Turn display on with no blinking.
          self.set_blink(HT16K33_BLINK_OFF)
          # Set display to full brightness.
          self.set_brightness(15)
docs: Initialize driver with LEDs enabled and all turned off.