#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address 0x27, 16 column and 2 rows
int counter = 0;
byte LT[8] =
{
  B00111,
  B01111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111
};
byte UB[8] =
{
  B11111,
  B11111,
  B11111,
  B00000,
  B00000,
  B00000,
  B00000,
  B00000
};
byte RT[8] =
{
  B11100,
  B11110,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111
};
byte LL[8] =
{
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B01111,
  B00111
};
byte LB[8] =
{
  B00000,
  B00000,
  B00000,
  B00000,
  B00000,
  B11111,
  B11111,
  B11111
};
byte LR[8] =
{
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11110,
  B11100
};
byte MB[8] =
{
  B11111,
  B11111,
  B11111,
  B00000,
  B00000,
  B00000,
  B11111,
  B11111
};
byte block[8] =
{
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111,
  B11111
};
void setup()
{
  lcd.begin();                      // initialize the lcd
  lcd.createChar(0,LT);
  lcd.createChar(1,UB);
  lcd.createChar(2,RT);
  lcd.createChar(3,LL);
  lcd.createChar(4,LB);
  lcd.createChar(5,LR);
  lcd.createChar(6,MB);
  lcd.createChar(7,block);
  // Print a message to the LCD.
  lcd.backlight();
   int temp = 10;
  lcd.clear();
  printDigits(0,0);
  printDigits(1,4);
  printDigits(2,8);
  printDigits(3,12);
}
void printNumber(int val){
     int col=9;    
     printDigits(val/10,col);
     printDigits(val%10,col+4);
}
void loop()
{
   lcd.clear();
   printNumber( counter );
   counter++;
   if( counter >= 100) counter= 0;
   delay(500);
}
void custom0(int x){
  lcd.setCursor(x,0);
  lcd.write((byte)0); 
  lcd.write(1); 
  lcd.write(2);
  lcd.setCursor(x, 1);
  lcd.write(3); 
  lcd.write(4); 
  lcd.write(5);
}
void custom1(int x){
  lcd.setCursor(x,0);
  lcd.write(1);
  lcd.write(2);
  lcd.print(" ");
  lcd.setCursor(x,1);
  lcd.write(4);
  lcd.write(7);
  lcd.write(4);
}
void custom2(int x){
  lcd.setCursor(x,0);
  lcd.write(6);
  lcd.write(6);
  lcd.write(2);
  lcd.setCursor(x, 1);
  lcd.write(3);
  lcd.write(4);
  lcd.write(4);
}
void custom3(int x){
  lcd.setCursor(x,0);
  lcd.write(6);
  lcd.write(6);
  lcd.write(2);
  lcd.setCursor(x, 1);
  lcd.write(4);
  lcd.write(4);
  lcd.write(5);
}
void custom4(int x){
  lcd.setCursor(x,0);
  lcd.write(3);
  lcd.write(4);
  lcd.write(7);
  lcd.setCursor(x, 1);
  lcd.print(" ");
  lcd.print(" ");
  lcd.write(7);
}
void custom5(int x){
  lcd.setCursor(x,0);
  lcd.write(3);
  lcd.write(6);
  lcd.write(6);
  lcd.setCursor(x, 1);
  lcd.write(4);
  lcd.write(4);
  lcd.write(5);
}
void custom6(int x){
  lcd.setCursor(x,0);
  lcd.write((byte)0);
  lcd.write(6);
  lcd.write(6);
  lcd.setCursor(x, 1);
  lcd.write(3);
  lcd.write(4);
  lcd.write(5);
}
void custom7(int x){
  lcd.setCursor(x,0);
  lcd.write(1);
  lcd.write(1);
  lcd.write(2);
  lcd.setCursor(x, 1);
  lcd.print(" ");
  lcd.print(" ");
  lcd.write(7);
}
void custom8(int x){
  lcd.setCursor(x,0);
  lcd.write((byte)0);
  lcd.write(6);
  lcd.write(2);
  lcd.setCursor(x, 1);
  lcd.write(3);
  lcd.write(4);
  lcd.write(5);
}
void custom9(int x){
  lcd.setCursor(x,0);
  lcd.write((byte)0);
  lcd.write(6);
  lcd.write(2);
  lcd.setCursor(x, 1);
  lcd.print(" ");
  lcd.print(" ");
  lcd.write(7);
}
void printDigits(int digits, int x){
  // utility function for digital clock display: prints preceding colon and leading 0
  switch (digits) {
  case 0: 
    custom0(x);
    break;
  case 1: 
    custom1(x);
    break;
  case 2: 
    custom2(x);
    break;
  case 3: 
    custom3(x);
    break;
  case 4: 
    custom4(x);
    break;
  case 5: 
    custom5(x);
    break;
  case 6: 
    custom6(x);
    break;
  case 7: 
    custom7(x);
    break;
  case 8: 
    custom8(x);
    break;
  case 9: 
    custom9(x);
    break;
  }
}