void setup()
{
 pinMode(0, OUTPUT);
 pinMode(1, OUTPUT);
 pinMode(2, OUTPUT);
}

void loop() 
{ 
 int LED=2;
 for (int N=3; N<=6; N=N+1) 
  {
   for (int i = 1; i <= N; i++) 
    {
  	 digitalWrite(LED, HIGH);
  	 delay(100); // Wait for 1000 millisecond(s)
  	 digitalWrite(LED, LOW);
  	 delay(100); // Wait for 1000 millisecond(s)
	  }
   LED=LED-1;
   wha:
   if( LED<0) 
    {
     goto wha;
	  }
  }
}