CD4029 up and down counter

cd4029.ino

// Basic test of CD4029 up and down counter module
// Module designed by Sagar Sapkota from www.buildcircuit.net

void setup() {
  pinMode(13, OUTPUT);// Connect pin 13 to CLK pinl
  pinMode(12,OUTPUT); // Connect pin 12 to UD
  //RESET THE COUNTER
  // Connect Pin 11 of Arduino to RST Pin
  pinMode(11,OUTPUT);
  digitalWrite(11,HIGH);
  delay(100);
  digitalWrite(11,LOW);
   
}

// the loop function runs over and over again forever
void loop() {

  for (int i=0;i<10;i++)
  {
  digitalWrite (12,HIGH);     // Keeping pin 12 HIGH or UD pin HIGH will make the counter count UP
  digitalWrite(13, HIGH);     //Pulse high to CLK pin of CD4029
  delay(500);                 // wait 
  digitalWrite(13, LOW);    // pulse low
  delay(500);    
  }
  
 for (int j=0;j<10;j++)
  {
  digitalWrite (12,LOW);    // Keeping pin 12 LOW or UD pin LOW will make the counter count DOWN
  digitalWrite(13, HIGH);   //Pulse high  
  delay(500);               // wait 
  digitalWrite(13, LOW);    // pulse low
  delay(500);    
  }

}

https://www.buildcircuit.net/cd4029