const int ledPin1 = 2;
const int ledPin2 = 3;
const int ledPin3 = 4;
const int ledPin4 = 5;
const int ledPin5 = 6;
const int ledPin6 = 7;
const int ledPin7 = 8;




void setup() {
  // put your setup code here, to run once:
pinMode(ledPin1, OUTPUT);
pinMode(ledPin2, OUTPUT);
pinMode(ledPin3, OUTPUT);
pinMode(ledPin4, OUTPUT);
pinMode(ledPin5, OUTPUT);
pinMode(ledPin6, OUTPUT);
pinMode(ledPin7, OUTPUT);


}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(ledPin1, HIGH);
  delay(50);
  digitalWrite(ledPin1, LOW);
  delay(25);
  digitalWrite(ledPin2, HIGH);
  delay(50);
  digitalWrite(ledPin2, LOW);
  delay(25);
  digitalWrite(ledPin3, HIGH);
  delay(50);
  digitalWrite(ledPin3, LOW);
  delay(25);
  digitalWrite(ledPin4, HIGH);
  delay(50);
  digitalWrite(ledPin4, LOW);
  delay(25);
  digitalWrite(ledPin5, HIGH);
  delay(50);
  digitalWrite(ledPin5, LOW);
  delay(25);
  digitalWrite(ledPin6, HIGH);
  delay(50);
  digitalWrite(ledPin6, LOW);
  delay(25);
  digitalWrite(ledPin7, HIGH);
  delay(50);
  digitalWrite(ledPin7, LOW);
  delay(25);
    digitalWrite(ledPin6, HIGH);
      delay(50);
        digitalWrite(ledPin6, LOW);
          delay(25);
            digitalWrite(ledPin5, HIGH);
              delay(50);
                digitalWrite(ledPin5, LOW);
                  delay(25);
                    digitalWrite(ledPin4, HIGH);
                      delay(50);
                        digitalWrite(ledPin4, LOW);
                          delay(25);
                            digitalWrite(ledPin3, HIGH);
                            delay(50);
                digitalWrite(ledPin3, LOW);
  delay(25);
  digitalWrite(ledPin2, HIGH);
  delay(50);
  digitalWrite(ledPin2, LOW);
  delay(25);
  digitalWrite(ledPin1, HIGH);
  delay(50);
  digitalWrite(ledPin1, LOW);
  delay(25);



}