int myPins[6] = {2,3,4,5,6,7}; 
void setup()
{
  pinMode (myPins[1],OUTPUT);
  pinMode (myPins[6],OUTPUT);
  pinMode (myPins[3],OUTPUT);
}
void loop()
{
  digitalWrite(myPins[1],HIGH);
  digitalWrite(myPins[6],HIGH);
  digitalWrite(myPins[3],HIGH);
delay(0);
  digitalWrite(myPins[1],LOW);
  digitalWrite(myPins[6],LOW);
  digitalWrite(myPins[3],LOW);
delay(3000);
}