void setup() {

  pinMode(5, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(2, OUTPUT);


}


void loop() {
    int x = 10;

while(1){
  digitalWrite(5, LOW);//1
  digitalWrite(4, LOW);
  digitalWrite(3, LOW);
  digitalWrite(2, HIGH);
  delay(x);              // wait for a second
  digitalWrite(5, LOW);//2
  digitalWrite(4, LOW);
  digitalWrite(3, HIGH);
  digitalWrite(2, HIGH);
    delay(x);              // wait for a second
  digitalWrite(5, LOW);//3
  digitalWrite(4, LOW);
  digitalWrite(3, HIGH);
  digitalWrite(2, LOW);
    delay(x);              // wait for a second
  digitalWrite(5, LOW);//4
  digitalWrite(4, HIGH);
  digitalWrite(3, HIGH);
  digitalWrite(2, LOW);
    delay(x);              // wait for a second
  digitalWrite(5, LOW);//5
  digitalWrite(4, HIGH);
  digitalWrite(3, LOW);
  digitalWrite(2, LOW);

   delay(x);              // wait for a second
  digitalWrite(5, HIGH);//6
  digitalWrite(4, HIGH);
  digitalWrite(3, LOW);
  digitalWrite(2, LOW);

    delay(x);              // wait for a second
  digitalWrite(5, HIGH); // 7
  digitalWrite(4, LOW);
  digitalWrite(3, LOW);
  digitalWrite(2, LOW);

    delay(x);              // wait for a second
  digitalWrite(5, HIGH); // 8
  digitalWrite(4, LOW);
  digitalWrite(3, LOW);
  digitalWrite(2, HIGH);

    delay(x);              // wait for a second

  }
}