int ledpins[] = {2, 3, 4, 5, 6, 7, 8, 9};
void setup() {
  // put your setup code here, to run once:
  for (int index = 0; index<= 7; index++){
    pinMode(ledpins[index], OUTPUT);
  }

}

void loop() {
  // put your main code here, to run repeatedly:
  //OneAfterAnotherNoLoop();
  OneAfterAnotherLoop();
  //OneOnAtTime();
  //Pingpong();
  //Marque();
  //RandomLED();
}
void OneAfterAnotherNoLoop(){
  digitalWrite(ledpins[0], HIGH);
  delay(100);
  digitalWrite(ledpins[1], HIGH);
  delay(100);
  digitalWrite(ledpins[2], HIGH);
  delay(100);
  digitalWrite(ledpins[3], HIGH);
  delay(100);
  digitalWrite(ledpins[4], HIGH);
  delay(100);
  digitalWrite(ledpins[5], HIGH);
  delay(100);
  digitalWrite(ledpins[6], HIGH);
  delay(100);
  digitalWrite(ledpins[7], HIGH);
  delay(100);

  digitalWrite(ledpins[7], LOW);
  delay(100);
  digitalWrite(ledpins[6], LOW);
  delay(100);
  digitalWrite(ledpins[5], LOW);
  delay(100);
  digitalWrite(ledpins[4], LOW);
  delay(100);
  digitalWrite(ledpins[3], LOW);
  delay(100);
  digitalWrite(ledpins[2], LOW);
  delay(100);
  digitalWrite(ledpins[1], LOW);
  delay(100);
  digitalWrite(ledpins[0], LOW);
  delay(100);
}
void OneAfterAnotherLoop(){
  for (int index = 0; index<= 7; index++){
  digitalWrite(ledpins[index], HIGH);
  delay(100);
}
for (int index = 0; index<= 7; index++){
  digitalWrite(ledpins[index], LOW);
  delay(100);
}
}