//Creating Two Dimentional array for numerical logic in common cathode mode

int arr[10][7]={{0,1,1,0,0,0,0},    //logic for 1
                {1,1,0,1,1,0,1},    //logic for 2
                {1,1,1,1,0,0,1},    //logic for 3
                {0,1,1,0,0,1,1},    //logic for 4
                {1,0,1,1,0,1,1},    //logic for 5
                {1,0,1,1,1,1,1},    //logic for 6
                {1,1,1,0,0,0,0},    //logic for 7
                {1,1,1,1,1,1,1},    //logic for 8
                {1,1,1,1,0,1,1},    //logic for 9
                {1,1,1,1,1,1,0}};   //logic for 0

void setup() {

  for(int i=2;i<9;i++)
  {
   pinMode(i, OUTPUT);  // Setting pin 2 to 8 as output pin configuration
  }
}

// Using Nested for Loop we are accessing 2D array as input to 7 segment Led

void loop() {
  
  for(int k=0;k<10;k++)
  {
    for(int i=2;i<9;i++)
    {
      for(int j=(i-2);j<=(i-2);j++)
        digitalWrite(i,arr[k][j]); 
    }
    delay(1000);
  }
}