void setup() {
 pinMode(4, OUTPUT);
 pinMode(3, OUTPUT);
 pinMode(2, OUTPUT);
 pinMode(5, OUTPUT);
 pinMode(6, OUTPUT);
 pinMode(7, OUTPUT);
}

void loop() {
  digitalWrite(4, HIGH);
    digitalWrite(5, HIGH);
    delay(5000);
  digitalWrite(4, LOW);
  digitalWrite(5, LOW);
  digitalWrite(3, HIGH);
   digitalWrite(6, HIGH);
  delay(1000);
  digitalWrite(6, LOW);
  digitalWrite(3, LOW);
  digitalWrite(2, HIGH);
  digitalWrite(7, HIGH);
  delay(5000);
  digitalWrite(7, LOW);
  digitalWrite(2, LOW);

  digitalWrite(3, HIGH);
   digitalWrite(6, HIGH);
  delay(1000);
  digitalWrite(6, LOW);
  digitalWrite(3, LOW);
}