text: #ifndef DISPLAY_MODE_H
  #define DISPLAY_MODE_H
  
  typedef byte display_mode;
          
  class Display_Mode {
      public:
          static const display_mode BLANK = 0x8;
          static const display_mode NORMAL = 0xc;
          static const display_mode ALL_SEGMENTS_ON = 0x9;
          static const display_mode INVERSE_VIDEO = 0xd;
  };
  
  #endif
  