//int led1 = 2;
//int led2 = 3;
int led[]={2,3,4,5};
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
 for (int i=0;i<=3;i++){
  pinMode(led[i], OUTPUT);
 // pinMode(led2, OUTPUT);

}
}

// the loop function runs over and over again forever
void loop() {
 for (int i=2;i<=3;i++){
  ledBlink(led[i],500);
  //ledBlink(led2);
 }
}

void ledBlink(int p, int t){      //p LED pin number, t time for the blink
  digitalWrite(p, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(t);                       // wait for a second
  digitalWrite(p, LOW);    // turn the LED off by making the voltage LOW
  delay(t);                       // wait for a second
  }