text: const unsigned char activeSymbol[] PROGMEM = {
      B00000000,
      B00000000,
      B00011000,
      B00100100,
      B01000010,
      B01000010,
      B00100100,
      B00011000
  };
  
  const unsigned char inactiveSymbol[] PROGMEM = {
      B00000000,
      B00000000,
      B00000000,
      B00000000,
      B00011000,
      B00011000,
      B00000000,
      B00000000
  };
  