const int led = 13; 
const int led1= 2;
int i = 0;

void setup() 
{
  pinMode(led, OUTPUT); 
}

void loop() 
{
  if (i < 10) 
  { 
    digitalWrite(led, HIGH);
    digitalWrite(led1, LOW);
    delay(500); 
    digitalWrite(led, LOW); 
    digitalWrite(led1, HIGH);
    delay(500); 
    i++; 
  }
  if(i==10)
  {
    digitalWrite(led1,LOW);
  }
}