text: #ifndef RENDERER_H
      #define	RENDERER_H
  
      #define CHAR_W 5
      #define CHAR_H 8
      #define SCREEN_COLUMNS 3
      #define SCREEN_ROWS 2
      #define SCREEN_W (SCREEN_COLUMNS*CHAR_W)
      #define SCREEN_H (SCREEN_ROWS*CHAR_H)
  
      #define PIXEL_ON 1
      #define PIXEL_OFF 0
  
      void setPixel(unsigned char x, unsigned char y, unsigned char val);
      void rendererInit();
      void rendererStart();
      void displayScreen();
      void cleanScreean();
      
  #endif
  
  