const int ledPinA = 2;
const int ledPinB = 3;
const int ledPinC = 4;
const int ledPinD = 5;
const int ledPinE = 6;
const int ledPinG = 7;
const int ledPinF = 8;

void setup() {
  // put your setup code here, to run once:
  pinMode(ledPinA , OUTPUT);
  pinMode(ledPinB , OUTPUT);
  pinMode(ledPinC , OUTPUT);
  pinMode(ledPinD , OUTPUT);
  pinMode(ledPinE , OUTPUT);
  pinMode(ledPinF , OUTPUT);
  pinMode(ledPinG , OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  // Turn off all LEDs
  digitalWrite(ledPinA , HIGH);
  digitalWrite(ledPinB , HIGH);
  digitalWrite(ledPinC , HIGH);
  digitalWrite(ledPinD , HIGH);
  digitalWrite(ledPinE , HIGH);
  digitalWrite(ledPinF , HIGH);
  digitalWrite(ledPinG , HIGH);
  delay(2000);

  // Turn on and off all LEDs
  digitalWrite(ledPinA , LOW);
  delay(1000);
  digitalWrite(ledPinA , HIGH);

  digitalWrite(ledPinB , LOW);
  delay(1000);
  digitalWrite(ledPinB , HIGH);

  digitalWrite(ledPinC , LOW);
  delay(1000);
  digitalWrite(ledPinC , HIGH);

  digitalWrite(ledPinD , LOW);
  delay(1000);
  digitalWrite(ledPinD , HIGH);

  digitalWrite(ledPinE , LOW);
  delay(1000);
  digitalWrite(ledPinE , HIGH);

  digitalWrite(ledPinF , LOW);
  delay(1000);
  digitalWrite(ledPinF , HIGH);

  digitalWrite(ledPinG , LOW);
  delay(1000);
  digitalWrite(ledPinG , HIGH);
  
}