int ledarray[] = {40,41,42,43,44,45,46,47};
void matikan(){
  for(int i = 0; i <= 7; i++){
  digitalWrite(ledarray[i], HIGH);
  }
}


void setup() {
  // put your setup code here, to run once:
  for(int i = 0; i <= 7; i++){
    pinMode(ledarray[i],OUTPUT);
  }
  matikan();
}

void loop() {
  // put your main code here, to run repeatedly:
  for(int i = 0; i <= 7; i++){
    matikan();
    digitalWrite(ledarray[i], LOW);
    delay(100);
  }
}