void setup() {
// put your setup code here, to run once:

  for (int i = 2; i < 7; i=i+1) {
   pinMode(i, OUTPUT);
  }
}

void loop() {
// put your main code here, to run repeatedly:
 
  for (int i = 2; i < 7; i=i+1) { // i nimm die Werte 2,3,4,5,6
    digitalWrite(i, HIGH);
    delay(200);
    digitalWrite(i, LOW);
    delay(200);
  }

  for (int i = 5; i >2; i=i-1) {  // i nimm die Werte 5,4,3
    digitalWrite(i, HIGH);
    delay(200);
    digitalWrite(i, LOW);
    delay(200);
  }


}