/** Functions ****************************/

void turnOnLedWithPin(int pin) {
  // Led digital write function
  digitalWrite(pin, HIGH);
  delay(1000);
  // Led digital write function
  digitalWrite(pin, LOW);
}

/** Setup function ***********************/
void setup() {
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
}

/** Loop function ************************/
void loop() {
  turnOnLedWithPin(5);
  turnOnLedWithPin(6);
  turnOnLedWithPin(7);
  turnOnLedWithPin(6);
  turnOnLedWithPin(5);
}