//Blink 6 LEDs one after another 
//adding loops

int a;

void setup()
{
   for(a=0;a<6;a++)
   {
      pinMode(a,OUTPUT);     //set the following pins as outputs
   }
}


void loop()
{
   for(a=0;a<6;a++)
   {
      digitalWrite(a, HIGH);
      delay(500);
      digitalWrite(a, LOW); 
   }
}